Added -ObjC LinkerFlags
Added -ObjC LinkerFlags

All static libraries containing Objective-C categories must pass -ObjC
to the native linker, otherwise the categories may be removed.
https://developer.apple.com/library/content/qa/qa1490/_index.html

martijn00/LottieXamarin,fabionuno/LottieXamarin,fabionuno/LottieXamarin,modplug/LottieXamarin,martijn00/LottieXamarin