Summary:
This changes the JS location of the examples (2048, UIExplorer, Movies, and TicTacToe) to be set from RCTBundleURLProvider instead.
This also makes the example apps run the bundle script, which makes the build time longer.

Reviewed By: javache

Differential Revision: D3516371

fbshipit-source-id: 70e53c62feb81c067df4e2298e7d1f1458777490