qtwebengine: Replace hard coded gitorous SRC_URI, use  QT_GIT variable instead
qtwebengine: Replace hard coded gitorous SRC_URI, use  QT_GIT variable instead

Signed-off-by: Timo Pulkkinen <06fc0caf8ea4ceb607d418c3ec3e02a15ee0927a@gmail.com>

timopulkkinen/meta-qt5,timopulkkinen/meta-qt5,timopulkkinen/meta-qt5,timopulkkinen/meta-qt5