Allow tests to be executed in platform agnostic environment

Summary:
changelog: [internal]

Make ManagedObjectWrapper compile in platform independent environment.

Reviewed By: ryancat

Differential Revision: D34302957

fbshipit-source-id: 50bf296983525c48cda1e532934b9998077c9fbf

ReactCommon/react/utils/ManagedObjectWrapper.h

@@ -9,6 +9,10 @@
 
 #include <react/debug/react_native_assert.h>
 
+#if defined(__APPLE__)
+#include <TargetConditionals.h>
+#endif
+
 #if defined(__OBJC__) && defined(__cplusplus)
 #if TARGET_OS_MAC && TARGET_OS_IPHONE