[TIMOB-8358] Splash Screen Localization Fix.

I forgot the fact that if we have a Default.png in the Resources/iphone folder it should also be removed otherwise, the app will always default to that splash screen.

__TESTING INSTRUCTION__

* Import the following [app](https://www.dropbox.com/s/93ry07ymymgvhru/splashtest.zip) into Studio.
* build for device. 
* Assuming your default language on your phone is english , your app should start with the following splash screen. 
![Default](https://f.cloud.github.com/assets/847863/91658/b03e1a5a-65a8-11e2-8824-99a81f9b53bc.png)
* If you check your project after the build, you can also confirm that Default.png will also be removed from Resources/iphone folder.