QtWebEngine refers to python in too many ways, apply this ugly workaround to let it build

git-svn-id: file:///srv/repos/svn-packages/svn@227556 eb2447ed-0c53-47e4-bac8-5bc4a241df78
Enable extra codecs support for QtMultimedia

git-svn-id: file:///srv/repos/svn-packages/svn@227557 eb2447ed-0c53-47e4-bac8-5bc4a241df78