A few more fixes for things that broke in commit 7be962bfc2 ("Move
subsurface-core to core and qt-mobile to mobile-widgets").
[Dirk Hohndel: slightly edited and overlap with Linus' patch removed]
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>