Fixes #1460. Add an `xcode-select` warning to bootstrap.sh.
Fixes #1460. Add an `xcode-select` warning to bootstrap.sh.

deltaprojects/cappuccino,Dogild/cappuccino,krodelin/cappuccino,AlexanderMazaletskiy/cappuccino,wangshijin/cappuccino,FrankReh/cappuccino,tancred/cappuccino,enquora/cappuccino,AlexanderMazaletskiy/cappuccino,Dogild/cappuccino,deltaprojects/cappuccino,Dogild/cappuccino,rgv151/cappuccino,rgv151/cappuccino,cacaodev/cappuccino,enquora/cappuccino,Dogild/cappuccino,zittix/cappuccino,kidaa/cappuccino,primalmotion/cappuccino,koamac/Cappuccino,cappuccino/cappuccino,Rosch/cappuccino,deltaprojects/cappuccino,mrcarlberg/cappuccino,rgv151/cappuccino,mrcarlberg/cappuccino,Dogild/cappuccino,mrcarlberg/cappuccino,tolmasky/cappuccino,cappuccino/cappuccino,FrankReh/cappuccino,enquora/cappuccino,cacaodev/cappuccino,daboe01/cappuccino,krodelin/cappuccino,wangshijin/cappuccino,Dogild/cappuccino,kidaa/cappuccino,mrcarlberg/cappuccino,enquora/cappuccino,FrankReh/cappuccino,Rosch/cappuccino,daboe01/cappuccino,primalmotion/cappuccino,mrcarlberg/cappuccino,tancred/cappuccino,daboe01/cappuccino,cacaodev/cappuccino,kidaa/cappuccino,daboe01/cappuccino,FrankReh/cappuccino,kidaa/cappuccino,koamac/Cappuccino,deltaprojects/cappuccino,cacaodev/cappuccino,tolmasky/cappuccino,cacaodev/cappuccino,FrankReh/cappuccino,enquora/cappuccino,koamac/Cappuccino,Rosch/cappuccino,daboe01/cappuccino,wangshijin/cappuccino,wangshijin/cappuccino,Dogild/cappuccino,zittix/cappuccino,tancred/cappuccino,primalmotion/cappuccino,Rosch/cappuccino,cappuccino/cappuccino,zittix/cappuccino,Rosch/cappuccino,tolmasky/cappuccino,cacaodev/cappuccino,wangshijin/cappuccino,tancred/cappuccino,mrcarlberg/cappuccino,FrankReh/cappuccino,deltaprojects/cappuccino,tancred/cappuccino,cappuccino/cappuccino,zittix/cappuccino,deltaprojects/cappuccino,mrcarlberg/cappuccino,daboe01/cappuccino,koamac/Cappuccino,AlexanderMazaletskiy/cappuccino,rgv151/cappuccino,koamac/Cappuccino,FrankReh/cappuccino,enquora/cappuccino,cappuccino/cappuccino,AlexanderMazaletskiy/cappuccino,primalmotion/cappuccino,kidaa/cappuccino,tolmasky/cappuccino,AlexanderMazaletskiy/cappuccino,primalmotion/cappuccino,zittix/cappuccino,zittix/cappuccino,cappuccino/cappuccino,mrcarlberg/cappuccino,cappuccino/cappuccino,primalmotion/cappuccino,wangshijin/cappuccino,primalmotion/cappuccino,koamac/Cappuccino,krodelin/cappuccino,rgv151/cappuccino,Rosch/cappuccino,deltaprojects/cappuccino,tancred/cappuccino,krodelin/cappuccino,FrankReh/cappuccino,rgv151/cappuccino,krodelin/cappuccino,krodelin/cappuccino,daboe01/cappuccino,tolmasky/cappuccino,AlexanderMazaletskiy/cappuccino,kidaa/cappuccino,Rosch/cappuccino,zittix/cappuccino,enquora/cappuccino,krodelin/cappuccino,rgv151/cappuccino,cacaodev/cappuccino