[OpenGL] use cute api

Xamarin.iOS 8.6.0.21
[SimpleTextInput] use cute api

Xamarin.iOS 8.6.0.21
[TextKitDemo] use cute api

Xamarin.iOS 8.6.0.21
[ThreadedCoreData] use cute api

Xamarin.iOS 8.6.0.21
[AppPrefs] use cute api

Xamarin.iOS 8.6.0.21
[AVCustomEdit] use cute api

Xamarin.iOS 8.6.0.21