[TIMOB-24484] iOS: Bundle images are copied to asset catalog when using app-thinning, causing apps to crash

I received [some reports](https://github.com/hansemannn/ti.googlemaps/issues/83#issuecomment-286364868) from users of my Ti.GoogleMaps module that are experiencing issues when using the <use-app-thinning> property together with bundle files that contain images [like here](https://github.com/hansemannn/ti.googlemaps/tree/master/ios/Resources). [The logs](https://gist.github.com/hansemannn/23922307da5a362049a0aa3edce25dc5) indicate that the bundle images are both copied to the bundle inside the app (correct) and the asset catalog (incorrect). The build should skip bundle images for the asset catalog I guess. Native apps would skip it as well, since the images are managed by the bundle. The fix should be done somewhere in copyResources, maybe with a regex like bundleFileRegExp = /.+\.bundle($|\n)/ that will only add the bundle to the resources, but not the images to the asset catalog.