* [msbuild] Fixed the Inputs for the _CodesignAppBundle target
The Inputs need to include the Info.plist, embedded.mobileprovision,
and the native libs/frameworks since those files also get included
in the _CodeSignature/CodeResources.
Fixes https://bugzilla.xamarin.com/show_bug.cgi?id=50791
* [msbuild] Added unit test to make sure _CodesignAppBundle logic works