[TIMOB-3136] iOS: Bug MediaModule.m Front/Rear Camera

Problem

Two problems in MediaModule.m: - camera_front and camera_rear are reversed. The front camera is the back, and the back camera is the front - vibrate's call to ensure_ui_thread specifies the callback method as the beep method; it happens that these two methods are identical, so it doesn't really matter... but...

Solution

Fix the code.

How To Test

Drop the following in an app.js and run it on a device with a front camera (like an iPad 2). It should use the front camera.

Ti.Media.showCamera({
    mediaTypes: Ti.Media.MEDIA_TYPE_PHOTO
});
Ti.Media.switchCamera(Ti.Media.CAMERA_FRONT);
Ti.Media.vibrate();

Reference Ticket

http://developer.appcelerator.com/helpdesk/view/72631

Pull Request

https://github.com/appcelerator/titanium_mobile/pull/627