backport QtGStreamer 1 support (#1092659)
    
    * Wed Jul 23 2014 Kevin Kofler <Kevin@tigcc.ticalc.org> - 4.1.0-3
    - apply upstream patch to handle QtGstreamer API 1.0 in VideoSlideShow tool;
      whether to build against QtGStreamer 0.10 or 1.x is autodetected (#1092659)