os/mac.rb: Fix active_developer_dir for Linuxbrew
os/mac.rb: Fix active_developer_dir for Linuxbrew

tdsmith/linuxbrew,afdnlw/linuxbrew,Angeldude/linuxbrew,jwillemsen/linuxbrew,caputomarcos/linuxbrew,Linuxbrew/linuxbrew,trskop/linuxbrew,tomas/linuxbrew,DoomHammer/linuxbrew,outcoldman/linuxbrew,tbetbetbe/linuxbrew,reelsense/linuxbrew,ebouaziz/linuxbrew,danabrand/linuxbrew,drbenmorgan/linuxbrew,adamliter/linuxbrew,reelsense/linuxbrew,amenk/linuxbrew,DoomHammer/linuxbrew,tghs/linuxbrew,telamonian/linuxbrew,adamliter/linuxbrew,sarvex/linuxbrew,tghs/linuxbrew,danabrand/linuxbrew,davydden/linuxbrew,bukzor/linuxbrew,jack-and-rozz/linuxbrew,amenk/linuxbrew,jack-and-rozz/linuxbrew,Angeldude/linuxbrew,hyokosdeveloper/linuxbrew,caputomarcos/linuxbrew,jwillemsen/linuxbrew,amenk/linuxbrew,sublimino/linuxbrew,jbaum98/linuxbrew,princeofdarkness76/linuxbrew,digiter/linuxbrew,Homebrew/linuxbrew,digiter/linuxbrew,afdnlw/linuxbrew,10sr/linuxbrew,dholm/linuxbrew,tghs/linuxbrew,Linuxbrew/linuxbrew,tdsmith/linuxbrew,lvicentesanchez/linuxbrew,Homebrew/linuxbrew,Gui13/linuxbrew,telamonian/linuxbrew,lvicentesanchez/linuxbrew,sarvex/linuxbrew,caputomarcos/linuxbrew,tjhei/linuxbrew,danabrand/linuxbrew,jbaum98/linuxbrew,arcivanov/linuxbrew,IsmailM/linuxbrew,SuperNEMO-DBD/cadfaelbrew,telamonian/linuxbrew,hyokosdeveloper/linuxbrew,saketkc/linuxbrew,Gui13/linuxbrew,IsmailM/linuxbrew,jbaum98/linuxbrew,tjhei/linuxbrew,saketkc/linuxbrew,jbaum98/linuxbrew,lvicentesanchez/linuxbrew,tomas/linuxbrew,tghs/linuxbrew,sjackman/linuxbrew,brevilo/linuxbrew,drbenmorgan/linuxbrew,10sr/linuxbrew,Gui13/linuxbrew,afdnlw/linuxbrew,drbenmorgan/linuxbrew,lvicentesanchez/linuxbrew,danabrand/linuxbrew,dunn/linuxbrew,trskop/linuxbrew,sublimino/linuxbrew,arcivanov/linuxbrew,dunn/linuxbrew,drbenmorgan/linuxbrew,bukzor/linuxbrew,gnubila-france/linuxbrew,digiter/linuxbrew,tdsmith/linuxbrew,dunn/linuxbrew,SuperNEMO-DBD/cadfaelbrew,tomas/linuxbrew,saketkc/linuxbrew,ebouaziz/linuxbrew,sarvex/linuxbrew,dunn/linuxbrew,outcoldman/linuxbrew,davydden/linuxbrew,adamliter/linuxbrew,tbetbetbe/linuxbrew,jwillemsen/linuxbrew,afdnlw/linuxbrew,reelsense/linuxbrew,tomas/linuxbrew,dholm/linuxbrew,tghs/linuxbrew,hyokosdeveloper/linuxbrew,sjackman/linuxbrew,LeonB/linuxbrew,sjackman/linuxbrew,romejoe/linuxbrew,DoomHammer/linuxbrew,brevilo/linuxbrew,IsmailM/linuxbrew,davydden/linuxbrew,gcstang/linuxbrew,SuperNEMO-DBD/cadfaelbrew,romejoe/linuxbrew,sublimino/linuxbrew,reelsense/linuxbrew,tbetbetbe/linuxbrew,10sr/linuxbrew,gnubila-france/linuxbrew,LeonB/linuxbrew,jack-and-rozz/linuxbrew,gcstang/linuxbrew,Angeldude/linuxbrew,Angeldude/linuxbrew,DoomHammer/linuxbrew,sublimino/linuxbrew,tjhei/linuxbrew,tdsmith/linuxbrew,princeofdarkness76/linuxbrew,tdsmith/linuxbrew,caputomarcos/linuxbrew,amenk/linuxbrew,ebouaziz/linuxbrew,dholm/linuxbrew,SuperNEMO-DBD/cadfaelbrew,sjackman/linuxbrew,Linuxbrew/linuxbrew,hyokosdeveloper/linuxbrew,outcoldman/linuxbrew,digiter/linuxbrew,Gui13/linuxbrew,bukzor/linuxbrew,bukzor/linuxbrew,digiter/linuxbrew,romejoe/linuxbrew,saketkc/linuxbrew,gnubila-france/linuxbrew,IsmailM/linuxbrew,princeofdarkness76/linuxbrew,gcstang/linuxbrew,davydden/linuxbrew,adamliter/linuxbrew,ebouaziz/linuxbrew,Homebrew/linuxbrew,trskop/linuxbrew,brevilo/linuxbrew,gnubila-france/linuxbrew,arcivanov/linuxbrew,sarvex/linuxbrew,Homebrew/linuxbrew,tbetbetbe/linuxbrew,Gui13/linuxbrew,Linuxbrew/linuxbrew,LeonB/linuxbrew