Bump MODULE_VERSION to 5.2.1
Bump MODULE_VERSION to 5.2.1

Change-Id: Ie1b6620a0f238effb7f25083ab10aaa78ce7dfc4
Reviewed-by: Matti Paaso <8b91ebfd223df5af67c6a381ab439b00620de590@digia.com>
Reviewed-by: Oswald Buddenhagen <6a8868beda3e139b5ac22b2534a23d3e6ba81819@digia.com>

mer-qt/qttools,mer-qt/qttools,mer-qt/qttools,mer-qt/qttools,mer-qt/qttools,mer-qt/qttools