Summary: Got bitten lately by View.js returning different component based on `__DEV__`
Adding a warning in the render method that should make it cleaner in the future that this method is not actually being used in prod mode.
Closes https://github.com/facebook/react-native/pull/4322
Reviewed By: svcscm
Differential Revision: D2691880
Pulled By: vjeux
fb-gh-sync-id: 119672740969a857ab6288b7914d52e8d40a1d95