Support xcconfig file from plugin - close #883
Support xcconfig file from plugin - close #883

tsvetie/nativescript-cli,tsvetie/nativescript-cli,NathanaelA/nativescript-cli,tsvetie/nativescript-cli,NativeScript/nativescript-cli,NathanaelA/nativescript-cli,NativeScript/nativescript-cli,tsvetie/nativescript-cli,tsvetie/nativescript-cli,NativeScript/nativescript-cli,NathanaelA/nativescript-cli,NativeScript/nativescript-cli,NathanaelA/nativescript-cli