When changing the cursor, call damage on it
When changing the cursor, call damage on it

so the image is recreated on the server side. If we don't do this any
the QImage/QPixmap on the serverside will not change its cache key

Change-Id: Ie085038e467a4f9676a32bdbecbd27e7cca4c0ff
Sanity-Review: Qt Sanity Bot <5581206bb7e0307f0d99eb71898ae6b694149ca5@ovi.com>
Reviewed-by: Samuel Rødal <99126055f8d73e4355b075213322026fa8c060bd@nokia.com>

Tofee/qtwayland,locusf/qtwayland-1,ntanibata/qtwayland,locusf/qtwayland-1,Tofee/qtwayland,ntanibata/qtwayland,locusf/qtwayland-1,Tofee/qtwayland,ntanibata/qtwayland,locusf/qtwayland-1