[TIMOB-2973] Android: attributes put on "manifest" element in tiapp.xml are ignored unless child elements also included

cf http://developer.appcelerator.com/question/103121">http://developer.appcelerator.com/question/103121

If you have an "android" section in tiapp.xml that looks like this:

    <android xmlns:android="http://schemas.android.com/apk/res/android">
        <manifest android:versionCode="2" android:versionName="2"/>
    </android>

... then those custom attributes that you put for android:versionCode and android:versionName will be ignored. If, however, you also put in a custom child element to for the "manifest" element, it will work. Such as this:

 <android xmlns:android="http://schemas.android.com/apk/res/android">
        <manifest android:versionCode="2" android:versionName="2">
            <uses-sdk android:minSdkVersion="4" />
        </manifest>
    </android>

So to test this failcase and its resolution, use the first example above -- just create a manifest entry with those android:versionCode and android:versionName attributes, setting them both to "2". Then build your app. After it's done launching, open the build/android/AndroidManifest.xml file (which is generated during the build process), and if you look at the "manifest" element in there you'll see that the versionCode and versionName are still set to 1 in the failing version. In the fixed version, they should successfully get set to 2.