ios: clean up toolchain setup
ios: clean up toolchain setup

gale320/lambdanative,gale320/lambdanative,gale320/lambdanative,emacstheviking/lambdanative,attila-lendvai/lambdanative,gale320/lambdanative,emacstheviking/lambdanative,emacstheviking/lambdanative,VincentToups/lambdanative,VincentToups/lambdanative,attila-lendvai/lambdanative,youprofit/lambdanative,VincentToups/lambdanative,youprofit/lambdanative,attila-lendvai/lambdanative,attila-lendvai/lambdanative,gale320/lambdanative,youprofit/lambdanative,VincentToups/lambdanative,emacstheviking/lambdanative,attila-lendvai/lambdanative,youprofit/lambdanative,youprofit/lambdanative,VincentToups/lambdanative,emacstheviking/lambdanative