sync.profile: Point dependencies to an empty string

This means that we are going to use the same branch name for the
dependencies as the branch of the repository under test.

If we are testing the 'stable' branch, all dependencies will point
to the 'stable' branch as well.

Change-Id: I9b031859972b0996987eb4cc697b06b0fb569d89
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>
Bump MODULE_VERSION to 5.1.1

Change-Id: I76871708e861efc18786f12ac1bcd6156003e875
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Merge remote-tracking branch 'origin/stable' into dev

Conflicts:
	.qmake.conf
	sync.profile

Change-Id: Ica3851cfaa4844644fbbe83c2e3c58803f170501