Move iOS/Mac directory determination to Platform
Move iOS/Mac directory determination to Platform

abbeycode/Carthage,abbeycode/Carthage,erichoracek/Carthage,flovilmart/Carthage,NachoSoto/Carthage,abbeycode/Carthage,abbeycode/Carthage,NachoSoto/Carthage,flovilmart/Carthage,NachoSoto/Carthage,flovilmart/Carthage,erichoracek/Carthage,erichoracek/Carthage,erichoracek/Carthage