qt5: remove spurious pkg-config dependency
qt5: remove spurious pkg-config dependency

On OS X, `pkg-config` won't be used by Qt unless explicitly requested
with the `-pkg-config` configure option.

ento/homebrew,ebouaziz/linuxbrew,johanhammar/homebrew,joshfriend/homebrew,dutchcoders/homebrew,1zaman/homebrew,AlekSi/homebrew,scorphus/homebrew,sakra/homebrew,thinker0/homebrew,decors/homebrew,deorth/homebrew,danieroux/homebrew,changzuozhen/homebrew,razamatan/homebrew,bchatard/homebrew,Noctem/homebrew,jsjohnst/homebrew,vladshablinsky/homebrew,kad/homebrew,hakamadare/homebrew,nelstrom/homebrew,mactkg/homebrew,dutchcoders/homebrew,thinker0/homebrew,AlekSi/homebrew,a-b/homebrew,pcottle/homebrew,max-horvath/homebrew,jab/homebrew,afb/homebrew,codeout/homebrew,Gasol/homebrew,hakamadare/homebrew,dongcarl/homebrew,gnubila-france/linuxbrew,xcezx/homebrew,kodabb/homebrew,felixonmars/homebrew,jarrettmeyer/homebrew,Red54/homebrew,Asuranceturix/homebrew,lvicentesanchez/linuxbrew,vihangm/homebrew,nandub/homebrew,yangj1e/homebrew,dickeyxxx/homebrew,jconley/homebrew,martinklepsch/homebrew,ear/homebrew,adamliter/homebrew,Cutehacks/homebrew,Chilledheart/homebrew,yumitsu/homebrew,slyphon/homebrew,BrewTestBot/homebrew,TaylorMonacelli/homebrew,aaronwolen/homebrew,dkotvan/homebrew,Gasol/homebrew,scorphus/homebrew,hongkongkiwi/homebrew,kad/homebrew,joshua-rutherford/homebrew,marcusandre/homebrew,jab/homebrew,dolfly/homebrew,jab/homebrew,kevinastone/homebrew,changzuozhen/homebrew,filcab/homebrew,ybott/homebrew,cosmo0920/homebrew,danieroux/homebrew,eagleflo/homebrew,dericed/homebrew,bchatard/homebrew,3van/homebrew,SuperNEMO-DBD/cadfaelbrew,totalvoidness/homebrew,dickeyxxx/homebrew,benjaminfrank/homebrew,arnested/homebrew,michaKFromParis/homebrew-sparks,michaKFromParis/homebrew-sparks,galaxy001/homebrew,davidcelis/homebrew,ericfischer/homebrew,bigbes/homebrew,kodabb/homebrew,kashif/homebrew,dickeyxxx/homebrew,ear/homebrew,danieroux/homebrew,razamatan/homebrew,tutumcloud/homebrew,amjith/homebrew,kad/homebrew,brunchboy/homebrew,felixonmars/homebrew,skinny-framework/homebrew,windoze/homebrew,emcrisostomo/homebrew,jamer/homebrew,chadcatlett/homebrew,mttrb/homebrew,jsjohnst/homebrew,teslamint/homebrew,razamatan/homebrew,deorth/homebrew,Linuxbrew/linuxbrew,dunn/homebrew,benjaminfrank/homebrew,pdpi/homebrew,okuramasafumi/homebrew,danabrand/linuxbrew,jbeezley/homebrew,colindean/homebrew,jedahan/homebrew,tschoonj/homebrew,theeternalsw0rd/homebrew,MoSal/homebrew,kevinastone/homebrew,muellermartin/homebrew,dkotvan/homebrew,kashif/homebrew,mactkg/homebrew,Red54/homebrew,bukzor/linuxbrew,slyphon/homebrew,base10/homebrew,getgauge/homebrew,sakra/homebrew,MoSal/homebrew,gnawhleinad/homebrew,josa42/homebrew,Homebrew/homebrew,princeofdarkness76/homebrew,thinker0/homebrew,cchacin/homebrew,chadcatlett/homebrew,elyscape/homebrew,elgertam/homebrew,colindean/homebrew,petere/homebrew,arg/homebrew,heinzf/homebrew,treyharris/homebrew,arg/homebrew,afh/homebrew,bchatard/homebrew,mommel/homebrew,totalvoidness/homebrew,hyuni/homebrew,vihangm/homebrew,ablyler/homebrew,3van/homebrew,vihangm/homebrew,brotbert/homebrew,bitrise-io/homebrew,patrickmckenna/homebrew,frickler01/homebrew,influxdata/homebrew,okuramasafumi/homebrew,MartinDelille/homebrew,davydden/linuxbrew,gnubila-france/linuxbrew,megahall/homebrew,cprecioso/homebrew,alebcay/homebrew,slyphon/homebrew,reelsense/linuxbrew,eighthave/homebrew,MartinDelille/homebrew,kenips/homebrew,craig5/homebrew,tjschuck/homebrew,decors/homebrew,Red54/homebrew,elgertam/homebrew,craig5/homebrew,manphiz/homebrew,blogabe/homebrew,martinklepsch/homebrew,hyuni/homebrew,ralic/homebrew,skatsuta/homebrew,liamstask/homebrew,windoze/homebrew,mkrapp/homebrew,skatsuta/homebrew,feelpp/homebrew,tsaeger/homebrew,lrascao/homebrew,yangj1e/homebrew,esamson/homebrew,megahall/homebrew,TaylorMonacelli/homebrew,sjackman/linuxbrew,elgertam/homebrew,LonnyGomes/homebrew,scorphus/homebrew,AlekSi/homebrew,lmontrieux/homebrew,gicmo/homebrew,menivaitsi/homebrew,ablyler/homebrew,ge11232002/homebrew,eagleflo/homebrew,lvicentesanchez/homebrew,ExtremeMan/homebrew,iandennismiller/homebrew,nandub/homebrew,jamer/homebrew,zeha/homebrew,cprecioso/homebrew,frodeaa/homebrew,afh/homebrew,muellermartin/homebrew,nelstrom/homebrew,ehamberg/homebrew,polishgeeks/homebrew,brunchboy/homebrew,ryanfb/homebrew,aaronwolen/homebrew,reelsense/homebrew,zhipeng-jia/homebrew,iandennismiller/homebrew,bitrise-io/homebrew,mommel/homebrew,coldeasy/homebrew,tjschuck/homebrew,cscetbon/homebrew,ebouaziz/linuxbrew,keith/homebrew,MartinDelille/homebrew,sometimesfood/homebrew,osimola/homebrew,yazuuchi/homebrew,vladshablinsky/homebrew,Habbie/homebrew,marcusandre/homebrew,tstack/homebrew,jbeezley/homebrew,saketkc/linuxbrew,dickeyxxx/homebrew,Noctem/homebrew,xyproto/homebrew,moyogo/homebrew,jconley/homebrew,lmontrieux/homebrew,ybott/homebrew,lvicentesanchez/homebrew,gnawhleinad/homebrew,yazuuchi/homebrew,vigo/homebrew,hakamadare/homebrew,a-b/homebrew,liamstask/homebrew,royhodgman/homebrew,totalvoidness/homebrew,ybott/homebrew,zhipeng-jia/homebrew,zhipeng-jia/homebrew,brotbert/homebrew,adamliter/homebrew,recruit-tech/homebrew,redpen-cc/homebrew,Homebrew/linuxbrew,mtigas/homebrew,cHoco/homebrew,jeremiahyan/homebrew,manphiz/homebrew,colindean/homebrew,max-horvath/homebrew,1zaman/homebrew,mtigas/homebrew,muellermartin/homebrew,pdxdan/homebrew,max-horvath/homebrew,ryanfb/homebrew,ralic/homebrew,Habbie/homebrew,danabrand/linuxbrew,theeternalsw0rd/homebrew,georgschoelly/homebrew,influxdb/homebrew,marcwebbie/homebrew,jsjohnst/homebrew,apjanke/homebrew,dongcarl/homebrew,SuperNEMO-DBD/cadfaelbrew,tstack/homebrew,OJFord/homebrew,tseven/homebrew,base10/homebrew,jedahan/homebrew,youtux/homebrew,okuramasafumi/homebrew,retrography/homebrew,tseven/homebrew,manphiz/homebrew,tstack/homebrew,afb/homebrew,ndimiduk/homebrew,moyogo/homebrew,saketkc/linuxbrew,bchatard/homebrew,AlekSi/homebrew,dplarson/homebrew,benjaminfrank/homebrew,dkotvan/homebrew,dalanmiller/homebrew,afh/homebrew,elgertam/homebrew,Homebrew/homebrew,hanxue/homebrew,AlexejK/homebrew,hyuni/homebrew,Asuranceturix/homebrew,miketheman/homebrew,geoff-codes/homebrew,hongkongkiwi/homebrew,Asuranceturix/homebrew,drewwells/homebrew,pdxdan/homebrew,ExtremeMan/homebrew,xyproto/homebrew,ndimiduk/homebrew,jab/homebrew,ge11232002/homebrew,alex/homebrew,royhodgman/homebrew,vigo/homebrew,gawbul/homebrew,afb/homebrew,Cutehacks/homebrew,mmizutani/homebrew,georgschoelly/homebrew,amarshall/homebrew,mttrb/homebrew,tsaeger/homebrew,polishgeeks/homebrew,grepnull/homebrew,cprecioso/homebrew,reelsense/linuxbrew,sferik/homebrew,lvicentesanchez/linuxbrew,brotbert/homebrew,mactkg/homebrew,zchee/homebrew,retrography/homebrew,yazuuchi/homebrew,tseven/homebrew,royhodgman/homebrew,craig5/homebrew,ilovezfs/homebrew,jconley/homebrew,ebouaziz/linuxbrew,joshfriend/homebrew,ebouaziz/linuxbrew,haihappen/homebrew,Homebrew/linuxbrew,Noctem/homebrew,utzig/homebrew,teslamint/homebrew,iandennismiller/homebrew,LinusU/homebrew,booi/homebrew,LinusU/homebrew,princeofdarkness76/homebrew,colindean/homebrew,Cutehacks/homebrew,michaKFromParis/homebrew-sparks,lvicentesanchez/homebrew,galaxy001/homebrew,Linuxbrew/linuxbrew,aaronwolen/homebrew,josa42/homebrew,ilovezfs/homebrew,coldeasy/homebrew,booi/homebrew,TaylorMonacelli/homebrew,jsjohnst/homebrew,ento/homebrew,DoomHammer/linuxbrew,xcezx/homebrew,hongkongkiwi/homebrew,deorth/homebrew,emcrisostomo/homebrew,ralic/homebrew,Red54/homebrew,manphiz/homebrew,bitrise-io/homebrew,dgageot/homebrew,esamson/homebrew,dgageot/homebrew,tutumcloud/homebrew,ExtremeMan/homebrew,xyproto/homebrew,grepnull/homebrew,iandennismiller/homebrew,pdxdan/homebrew,patrickmckenna/homebrew,Angeldude/linuxbrew,alebcay/homebrew,influxdb/homebrew,yangj1e/homebrew,tjschuck/homebrew,Homebrew/homebrew,jarrettmeyer/homebrew,OJFord/homebrew,vladshablinsky/homebrew,LinusU/homebrew,zhipeng-jia/homebrew,apjanke/homebrew,frodeaa/homebrew,OJFord/homebrew,danabrand/linuxbrew,frodeaa/homebrew,apjanke/homebrew,sometimesfood/homebrew,emcrisostomo/homebrew,cscetbon/homebrew,scpeters/homebrew,retrography/homebrew,jmagnusson/homebrew,zeha/homebrew,SteveClement/homebrew,influxdata/homebrew,totalvoidness/homebrew,1zaman/homebrew,bukzor/linuxbrew,feelpp/homebrew,mtigas/homebrew,youtux/homebrew,marcwebbie/homebrew,marcusandre/homebrew,mommel/homebrew,cHoco/homebrew,xyproto/homebrew,scpeters/homebrew,Homebrew/homebrew,skinny-framework/homebrew,alex/homebrew,miketheman/homebrew,dgageot/homebrew,saketkc/linuxbrew,haihappen/homebrew,frickler01/homebrew,skinny-framework/homebrew,eighthave/homebrew,esamson/homebrew,megahall/homebrew,bigbes/homebrew,Angeldude/linuxbrew,menivaitsi/homebrew,sakra/homebrew,chadcatlett/homebrew,pdpi/homebrew,thinker0/homebrew,cchacin/homebrew,menivaitsi/homebrew,petere/homebrew,sferik/homebrew,retrography/homebrew,jmagnusson/homebrew,brunchboy/homebrew,dkotvan/homebrew,brotbert/homebrew,dongcarl/homebrew,nelstrom/homebrew,sjackman/linuxbrew,dalanmiller/homebrew,amarshall/homebrew,ericfischer/homebrew,drbenmorgan/linuxbrew,coldeasy/homebrew,BrewTestBot/homebrew,jiashuw/homebrew,ndimiduk/homebrew,Homebrew/linuxbrew,Homebrew/linuxbrew,Gasol/homebrew,heinzf/homebrew,amjith/homebrew,codeout/homebrew,danieroux/homebrew,grepnull/homebrew,lrascao/homebrew,dolfly/homebrew,influxdata/homebrew,muellermartin/homebrew,yumitsu/homebrew,felixonmars/homebrew,TaylorMonacelli/homebrew,alex/homebrew,galaxy001/homebrew,Linuxbrew/linuxbrew,Habbie/homebrew,sferik/homebrew,mactkg/homebrew,SuperNEMO-DBD/cadfaelbrew,AlexejK/homebrew,skatsuta/homebrew,changzuozhen/homebrew,davidcelis/homebrew,youtux/homebrew,MoSal/homebrew,polishgeeks/homebrew,lrascao/homebrew,moyogo/homebrew,nelstrom/homebrew,miketheman/homebrew,tutumcloud/homebrew,tschoonj/homebrew,arg/homebrew,pcottle/homebrew,hakamadare/homebrew,amarshall/homebrew,arg/homebrew,osimola/homebrew,ehamberg/homebrew,filcab/homebrew,johanhammar/homebrew,vladshablinsky/homebrew,hanxue/homebrew,pcottle/homebrew,iostat/homebrew2,petere/homebrew,knpwrs/homebrew,josa42/homebrew,youtux/homebrew,gnubila-france/linuxbrew,yumitsu/homebrew,drbenmorgan/linuxbrew,tsaeger/homebrew,kodabb/homebrew,feelpp/homebrew,LonnyGomes/homebrew,geoff-codes/homebrew,amarshall/homebrew,joshua-rutherford/homebrew,filcab/homebrew,reelsense/homebrew,skatsuta/homebrew,SteveClement/homebrew,iostat/homebrew2,LonnyGomes/homebrew,joshua-rutherford/homebrew,recruit-tech/homebrew,geoff-codes/homebrew,knpwrs/homebrew,davydden/linuxbrew,drbenmorgan/linuxbrew,kvs/homebrew,Cutehacks/homebrew,reelsense/homebrew,kad/homebrew,kenips/homebrew,vigo/homebrew,scpeters/homebrew,georgschoelly/homebrew,filcab/homebrew,mobileoverlord/homebrew-1,kvs/homebrew,liamstask/homebrew,OJFord/homebrew,dalanmiller/homebrew,iostat/homebrew2,BrewTestBot/homebrew,patrickmckenna/homebrew,mobileoverlord/homebrew-1,joshfriend/homebrew,johanhammar/homebrew,ge11232002/homebrew,scpeters/homebrew,frickler01/homebrew,tsaeger/homebrew,ear/homebrew,ento/homebrew,treyharris/homebrew,cchacin/homebrew,scorphus/homebrew,SteveClement/homebrew,zeha/homebrew,a-b/homebrew,booi/homebrew,BrewTestBot/homebrew,pdxdan/homebrew,jiashuw/homebrew,koraktor/homebrew,mkrapp/homebrew,utzig/homebrew,AlexejK/homebrew,knpwrs/homebrew,lvicentesanchez/homebrew,kodabb/homebrew,jmagnusson/homebrew,reelsense/homebrew,frodeaa/homebrew,hyuni/homebrew,feelpp/homebrew,dongcarl/homebrew,grepnull/homebrew,emcrisostomo/homebrew,tseven/homebrew,reelsense/linuxbrew,codeout/homebrew,theeternalsw0rd/homebrew,Angeldude/linuxbrew,ilovezfs/homebrew,utzig/homebrew,georgschoelly/homebrew,knpwrs/homebrew,mttrb/homebrew,heinzf/homebrew,sakra/homebrew,heinzf/homebrew,polishgeeks/homebrew,DoomHammer/linuxbrew,slyphon/homebrew,martinklepsch/homebrew,keith/homebrew,cosmo0920/homebrew,SteveClement/homebrew,sjackman/linuxbrew,ExtremeMan/homebrew,davidcelis/homebrew,mmizutani/homebrew,felixonmars/homebrew,davydden/linuxbrew,codeout/homebrew,alebcay/homebrew,kenips/homebrew,kvs/homebrew,martinklepsch/homebrew,liamstask/homebrew,blogabe/homebrew,jeremiahyan/homebrew,optikfluffel/homebrew,benjaminfrank/homebrew,tschoonj/homebrew,ear/homebrew,ryanfb/homebrew,changzuozhen/homebrew,dolfly/homebrew,AGWA-forks/homebrew,ablyler/homebrew,influxdb/homebrew,bigbes/homebrew,base10/homebrew,ehamberg/homebrew,jbeezley/homebrew,AGWA-forks/homebrew,quantumsteve/homebrew,MoSal/homebrew,dutchcoders/homebrew,alebcay/homebrew,menivaitsi/homebrew,jeremiahyan/homebrew,reelsense/linuxbrew,hongkongkiwi/homebrew,jiashuw/homebrew,zeha/homebrew,windoze/homebrew,bukzor/linuxbrew,influxdata/homebrew,kevinastone/homebrew,ralic/homebrew,patrickmckenna/homebrew,influxdb/homebrew,geoff-codes/homebrew,jamer/homebrew,alex/homebrew,sometimesfood/homebrew,kvs/homebrew,amjith/homebrew,mobileoverlord/homebrew-1,optikfluffel/homebrew,gvangool/homebrew,ericfischer/homebrew,frickler01/homebrew,marcusandre/homebrew,decors/homebrew,dericed/homebrew,saketkc/linuxbrew,getgauge/homebrew,mttrb/homebrew,bukzor/linuxbrew,jarrettmeyer/homebrew,Chilledheart/homebrew,treyharris/homebrew,lvicentesanchez/linuxbrew,blogabe/homebrew,base10/homebrew,redpen-cc/homebrew,lmontrieux/homebrew,quantumsteve/homebrew,utzig/homebrew,pdpi/homebrew,arnested/homebrew,cprecioso/homebrew,moyogo/homebrew,nandub/homebrew,kenips/homebrew,okuramasafumi/homebrew,koraktor/homebrew,pdpi/homebrew,3van/homebrew,ge11232002/homebrew,haihappen/homebrew,AGWA-forks/homebrew,afb/homebrew,eighthave/homebrew,arnested/homebrew,DoomHammer/linuxbrew,sometimesfood/homebrew,drewwells/homebrew,megahall/homebrew,dalanmiller/homebrew,max-horvath/homebrew,Habbie/homebrew,3van/homebrew,elyscape/homebrew,redpen-cc/homebrew,ndimiduk/homebrew,xcezx/homebrew,gicmo/homebrew,adamliter/homebrew,jiashuw/homebrew,drewwells/homebrew,princeofdarkness76/homebrew,amjith/homebrew,Asuranceturix/homebrew,AGWA-forks/homebrew,teslamint/homebrew,dutchcoders/homebrew,danabrand/linuxbrew,cscetbon/homebrew,Angeldude/linuxbrew,yangj1e/homebrew,xcezx/homebrew,cosmo0920/homebrew,cosmo0920/homebrew,joshua-rutherford/homebrew,cHoco/homebrew,eagleflo/homebrew,sjackman/linuxbrew,theeternalsw0rd/homebrew,tschoonj/homebrew,SteveClement/homebrew,optikfluffel/homebrew,hanxue/homebrew,dplarson/homebrew,gnawhleinad/homebrew,Gasol/homebrew,ryanfb/homebrew,jedahan/homebrew,quantumsteve/homebrew,osimola/homebrew,razamatan/homebrew,getgauge/homebrew,windoze/homebrew,tutumcloud/homebrew,jconley/homebrew,redpen-cc/homebrew,recruit-tech/homebrew,kashif/homebrew,davydden/linuxbrew,Linuxbrew/linuxbrew,jamer/homebrew,quantumsteve/homebrew,apjanke/homebrew,dunn/homebrew,zchee/homebrew,marcwebbie/homebrew,iostat/homebrew2,hanxue/homebrew,LinusU/homebrew,mobileoverlord/homebrew-1,dgageot/homebrew,pcottle/homebrew,gicmo/homebrew,adamliter/homebrew,gvangool/homebrew,mmizutani/homebrew,johanhammar/homebrew,osimola/homebrew,gawbul/homebrew,craig5/homebrew,galaxy001/homebrew,coldeasy/homebrew,eagleflo/homebrew,gvangool/homebrew,zchee/homebrew,drewwells/homebrew,ericfischer/homebrew,1zaman/homebrew,drbenmorgan/linuxbrew,koraktor/homebrew,keith/homebrew,dunn/homebrew,sferik/homebrew,gvangool/homebrew,recruit-tech/homebrew,gnawhleinad/homebrew,mtigas/homebrew,jmagnusson/homebrew,DoomHammer/linuxbrew,bigbes/homebrew,kevinastone/homebrew,gicmo/homebrew,ablyler/homebrew,ehamberg/homebrew,dplarson/homebrew,royhodgman/homebrew,gawbul/homebrew,ento/homebrew,optikfluffel/homebrew,marcwebbie/homebrew,afh/homebrew,blogabe/homebrew,kashif/homebrew,bitrise-io/homebrew,SuperNEMO-DBD/cadfaelbrew,dplarson/homebrew,mommel/homebrew,Chilledheart/homebrew,dolfly/homebrew,teslamint/homebrew,keith/homebrew,pcottle/homebrew,brunchboy/homebrew,Chilledheart/homebrew,elyscape/homebrew,eighthave/homebrew,Asuranceturix/homebrew,jedahan/homebrew,MartinDelille/homebrew,esamson/homebrew,jeremiahyan/homebrew,dericed/homebrew,ilovezfs/homebrew,koraktor/homebrew,tstack/homebrew,aaronwolen/homebrew,lmontrieux/homebrew,cHoco/homebrew,decors/homebrew,dunn/homebrew,nandub/homebrew,skinny-framework/homebrew,vigo/homebrew,Noctem/homebrew,jarrettmeyer/homebrew,vihangm/homebrew,jbeezley/homebrew,ybott/homebrew,a-b/homebrew,mmizutani/homebrew,elyscape/homebrew,treyharris/homebrew,gnubila-france/linuxbrew,petere/homebrew,yazuuchi/homebrew,LonnyGomes/homebrew,lvicentesanchez/linuxbrew,haihappen/homebrew,mkrapp/homebrew,cchacin/homebrew,arnested/homebrew,miketheman/homebrew,dericed/homebrew,tjschuck/homebrew,AlexejK/homebrew,zchee/homebrew,davidcelis/homebrew,princeofdarkness76/homebrew,getgauge/homebrew