Fix .gitignore so that it ignores Carthage build directory as well
Fix .gitignore so that it ignores Carthage build directory as well

col/Starscream,pvzig/Starscream,knorrium/Starscream,alex-learn/Starscream,muukii/Starscream,borregoho/Starscream,knorrium/Starscream,isno/Starscream,col/Starscream,knorrium/Starscream,Anish-kumar-dev/Starscream,appunite/Starscream,muukii0803/Starscream,nuclearace/Starscream,NDV-Lab/Starscream,msdgwzhy6/Starscream,sunfei/Starscream,TeletronicsDotAe/Starscream,alex-learn/Starscream,muukii/Starscream,sunfei/Starscream,nuclearace/Starscream,wakinchan/Starscream,wakinchan/Starscream,TeletronicsDotAe/Starscream,msdgwzhy6/Starscream,isno/Starscream,appunite/Starscream,cantinac/Starscream,cantinac/Starscream,cantinac/Starscream,borregoho/Starscream,pvzig/Starscream,Anish-kumar-dev/Starscream,nuclearace/Starscream,imjerrybao/Starscream,daltoniam/Starscream,Anish-kumar-dev/Starscream,daltoniam/Starscream,sunfei/Starscream,appunite/Starscream,imjerrybao/Starscream,col/Starscream,msdgwzhy6/Starscream,daltoniam/Starscream,NDV-Lab/Starscream,muukii0803/Starscream