Only run configure in the Rust submodule when we actually use it.
Only run configure in the Rust submodule when we actually use it.

anthgur/servo,mdibaiee/servo,s142857/servo,s142857/servo,fiji-flo/servo,brendandahl/servo,karlito40/servo,mattnenterprise/servo,pgonda/servo,CJ8664/servo,pyfisch/servo,DominoTree/servo,echochamber/servo,Adenilson/prototype-viewing-distance,boghison/servo,KiChjang/servo,AnthonyBroadCrawford/servo,steveklabnik/servo,thiagopnts/servo,evilpie/servo,avadacatavra/servo,evilpie/servo,nnethercote/servo,nerith/servo,saneyuki/servo,tschneidereit/servo,peterjoel/servo,KiChjang/servo,notriddle/servo,dati91/servo,meh/servo,upsuper/servo,AnthonyBroadCrawford/servo,szeged/servo,anthgur/servo,zentner-kyle/servo,walac/servo,snf/servo,pgonda/servo,nrc/servo,GreenRecycleBin/servo,youprofit/servo,canaltinova/servo,cbrewster/servo,ryancanhelpyou/servo,chotchki/servo,GyrosOfWar/servo,paulrouget/servo,canaltinova/servo,jgraham/servo,srbhklkrn/SERVOENGINE,GreenRecycleBin/servo,wpgallih/servo,cbrewster/servo,thiagopnts/servo,mukilan/servo,mattnenterprise/servo,Adenilson/prototype-viewing-distance,dsandeephegde/servo,akosel/servo,huonw/servo,sadmansk/servo,jimberlage/servo,walac/servo,tafia/servo,deokjinkim/servo,AnthonyBroadCrawford/servo,mdibaiee/servo,rixrix/servo,dagnir/servo,upsuper/servo,huonw/servo,nrc/servo,wartman4404/servo,dati91/servo,thiagopnts/servo,WriterOfAlicrow/servo,szeged/servo,RenaudParis/servo,dati91/servo,dagnir/servo,dsandeephegde/servo,ruud-v-a/servo,michaelwu/servo,michaelwu/servo,pyfisch/servo,brendandahl/servo,j3parker/servo,g-k/servo,pyfisch/servo,jlegendary/servo,dmarcos/servo,boghison/servo,michaelwu/servo,ruud-v-a/servo,mt2d2/servo,splav/servo,wartman4404/servo,mattnenterprise/servo,aweinstock314/servo,mattnenterprise/servo,nrc/servo,GreenRecycleBin/servo,steveklabnik/servo,aweinstock314/servo,KiChjang/servo,fiji-flo/servo,SimonSapin/servo,saneyuki/servo,splav/servo,wartman4404/servo,cbrewster/servo,jdramani/servo,jimberlage/servo,jdramani/servo,tafia/servo,codemac/servo,tschneidereit/servo,tschneidereit/servo,ryancanhelpyou/servo,luniv/servo,larsbergstrom/servo,DominoTree/servo,WriterOfAlicrow/servo,RenaudParis/servo,zhangjunlei26/servo,dagnir/servo,sadmansk/servo,larsbergstrom/servo,Adenilson/prototype-viewing-distance,g-k/servo,rixrix/servo,karlito40/servo,fiji-flo/servo,DominoTree/servo,rnestler/servo,s142857/servo,michaelwu/servo,bjwbell/servo,dsandeephegde/servo,caldwell/servo,rentongzhang/servo,dhananjay92/servo,jimberlage/servo,nnethercote/servo,dvberkel/servo,samfoo/servo,avadacatavra/servo,saratang/servo,ConnorGBrewster/servo,meh/servo,srbhklkrn/SERVOENGINE,Shraddha512/servo,froydnj/servo,pgonda/servo,saratang/servo,boghison/servo,huonw/servo,mattnenterprise/servo,avadacatavra/servo,KiChjang/servo,jgraham/servo,jdramani/servo,saneyuki/servo,mdibaiee/servo,CJ8664/servo,eddyb/servo,DominoTree/servo,szeged/servo,kindersung/servo,kindersung/servo,rixrix/servo,Adenilson/prototype-viewing-distance,indykish/servo,meh/servo,thiagopnts/servo,notriddle/servo,ryancanhelpyou/servo,fiji-flo/servo,caldwell/servo,emilio/servo,notriddle/servo,nrc/servo,codemac/servo,CJ8664/servo,juzer10/servo,anthgur/servo,nnethercote/servo,indykish/servo,rixrix/servo,brendandahl/servo,hyowon/servo,jdramani/servo,Shraddha512/servo,bjwbell/servo,DominoTree/servo,tschneidereit/servo,aidanhs/servo,RenaudParis/servo,szeged/servo,caldwell/servo,chotchki/servo,nrc/servo,cbrewster/servo,RenaudParis/servo,splav/servo,aidanhs/servo,thiagopnts/servo,paulrouget/servo,shrenikgala/servo,mt2d2/servo,luniv/servo,bjwbell/servo,rnestler/servo,deokjinkim/servo,mattnenterprise/servo,CJ8664/servo,splav/servo,walac/servo,eddyb/servo,vks/servo,splav/servo,sadmansk/servo,pyfisch/servo,samfoo/servo,karlito40/servo,dvberkel/servo,sadmansk/servo,zhangjunlei26/servo,cbrewster/servo,shrenikgala/servo,saneyuki/servo,juzer10/servo,mbrubeck/servo,dvberkel/servo,paulrouget/servo,nerith/servo,jgraham/servo,WriterOfAlicrow/servo,peterjoel/servo,GyrosOfWar/servo,luniv/servo,mukilan/servo,saneyuki/servo,caldwell/servo,wpgallih/servo,mt2d2/servo,nrc/servo,youprofit/servo,larsbergstrom/servo,jdramani/servo,eddyb/servo,ryancanhelpyou/servo,jgraham/servo,peterjoel/servo,upsuper/servo,pyecs/servo,dmarcos/servo,A-deLuna/servo,youprofit/servo,echochamber/servo,echochamber/servo,wpgallih/servo,wpgallih/servo,srbhklkrn/SERVOENGINE,youprofit/servo,boghison/servo,dhananjay92/servo,mdibaiee/servo,eddyb/servo,pgonda/servo,luniv/servo,nick-thompson/servo,rixrix/servo,szeged/servo,GreenRecycleBin/servo,notriddle/servo,jlegendary/servo,DominoTree/servo,pyfisch/servo,ConnorGBrewster/servo,dati91/servo,GreenRecycleBin/servo,eddyb/servo,AnthonyBroadCrawford/servo,rnestler/servo,akosel/servo,canaltinova/servo,ConnorGBrewster/servo,A-deLuna/servo,pyecs/servo,karlito40/servo,codemac/servo,Shraddha512/servo,froydnj/servo,rixrix/servo,tschneidereit/servo,tempbottle/servo,GreenRecycleBin/servo,nick-thompson/servo,avadacatavra/servo,mattnenterprise/servo,szeged/servo,nerith/servo,nrc/servo,echochamber/servo,srbhklkrn/SERVOENGINE,aidanhs/servo,evilpie/servo,notriddle/servo,jlegendary/se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hang/servo,snf/servo,echochamber/servo,mukilan/servo,zentner-kyle/servo,upsuper/servo,cbrewster/servo,wpgallih/servo,ruud-v-a/servo,zentner-kyle/servo,Adenilson/prototype-viewing-distance,youprofit/servo,paulrouget/servo,dhananjay92/servo,snf/servo,kindersung/servo,fiji-flo/servo,nick-thompson/servo,bjwbell/servo,aidanhs/servo,juzer10/servo,nnethercote/servo,j3parker/servo,saneyuki/servo,runarberg/servo,aidanhs/servo,pyecs/servo,dvberkel/servo,hyowon/servo,codemac/servo,chotchki/servo,peterjoel/servo,mbrubeck/servo,GyrosOfWar/servo,kindersung/servo,indykish/servo,saratang/servo,runarberg/servo,chotchki/servo,jimberlage/servo,SimonSapin/servo,avadacatavra/servo,mt2d2/servo,dvberkel/servo,aweinstock314/servo,mbrubeck/servo,dsandeephegde/servo,larsbergstrom/servo,jdramani/servo,michaelwu/servo,bfrohs/servo,pyfisch/servo,tafia/servo,jlegendary/servo,srbhklkrn/SERVOENGINE,emilio/servo,GyrosOfWar/servo,srbhklkrn/SERVOENGINE,s142857/servo,kindersung/servo,mbrubeck/servo,nnethercote/servo,larsbergstrom/servo,tempbottle/servo,Adenilson/prototype-viewing-distance,luniv/servo,thiagopnts/servo,jlegendary/servo,akosel/servo,dmarcos/servo,dati91/servo,mukilan/servo,boghison/servo,tempbottle/servo,splav/servo,akosel/servo,froydnj/servo,akosel/servo,runarberg/servo,peterjoel/servo,ConnorGBrewster/servo,mbrubeck/servo,dagnir/servo,wpgallih/servo,zhangjunlei26/servo,j3parker/servo,aidanhs/servo,eddyb/servo,hyowon/servo,huonw/servo,eddyb/servo,wpgallih/servo,wartman4404/servo,rixrix/servo,notriddle/servo,wartman4404/servo,emilio/servo,KiChjang/servo,chotchki/servo,peterjoel/servo,runarberg/servo,luniv/servo,splav/servo,codemac/servo,nnethercote/servo,emilio/servo,huonw/servo,sadmansk/servo,indykish/servo,dvberkel/servo,runarberg/servo,notriddle/servo,paulrouget/servo,rixrix/servo,A-deLuna/servo,upsuper/servo,dagnir/servo,emilio/servo,jlegendary/servo,szeged/servo,tempbottle/servo,sadmansk/servo,samfoo/servo,hyowon/servo,ConnorGBrewster/servo,walac/servo,g-k/servo,ruud-v-a/servo,WriterOfAlicrow/servo,pyecs/servo,zentner-kyle/servo,A-deLuna/servo,hyowon/servo,dagnir/servo,indykish/servo