Tools: unnecessary to make qmlplugindump a bundle

Embed Info.plist in qmlplugindump executable in a special way.

Change-Id: I7eb73d0f832ab53d352c1fd2275f77e853269c2c
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@digia.com>
Reviewed-by: Kai Koehne <kai.koehne@digia.com>