[introspection] A few fixes for watchOS.

tests/introspection/iOS/iOSApiClassPtrTest.cs

@@ -26,6 +26,12 @@ namespace Introspection {
 				if (TestRuntime.IsSimulatorOrDesktop)
 					return true;
 				break;
+#if __WATCHOS__
+			case "GameKit":
+				if (IntPtr.Size == 4)
+					return true;
+				break;
+#endif
 			}
 
 			// While the following types are categories and contains a class_ptr

tests/introspection/iOS/iOSApiFieldTest.cs

@@ -160,6 +160,10 @@ namespace Introspection {
 			// Xcode 12.2 Beta 1 does not ship this but it is available in Xcode 12.0...
 			case "HKMetadataKeyBarometricPressure":
 				return true;
+#if __WATCHOS__
+			case "AVCaptureLensPositionCurrent": // looks like this was bound by mistake in watchOS
+				return true;
+#endif
 			default:
 				return false;
 			}

tests/introspection/iOS/iOSApiSelectorTest.cs

@@ -34,6 +34,12 @@ namespace Introspection {
 		protected override bool Skip (Type type)
 		{
 			switch (type.Namespace) {
+#if __WATCHOS__
+			case "GameKit":
+				if (IntPtr.Size == 4)
+					return true;
+				break;
+#endif
 			// they don't answer on the simulator (Apple implementation does not work) but fine on devices
 			case "GameController":
 			case "MonoTouch.GameController":