mkqt5bld: Rename .so files for Android on Windows

On Windows, libraries are named libQt5FooBar.so.5.2.0 instead of libQt5FooBar.so.
Because of this, it's impossible to build any Qt application against Android.

Task-number: QTBUG-33793
Change-Id: I17e264fb62412316bc6d884170d63442e31eb1a4
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>