Summary:
This diff adds a JS spec for RCTImageLoader, and conforms to it in ObjC++. Since RCTImageLoader isn't called from JS, the js spec is empty. Since `/CoreModules/` is the only dir in OSS which supports TM, move the ObjC++ impl there.
The change in `NativeExceptionsManager.js` fixes a weird bug I was hitting in codegen, where the codegen cpp file wouldn't compile due to unused variable.
Reviewed By: JoshuaGross
Differential Revision: D16495674
fbshipit-source-id: 191897b87730a6b0b96022eedc6412551fae04a6
Peter Argany
30c1196d7d