Require cmake 2.8.4 since the $<> generator expressions are not implemented in previous versions.
Require cmake 2.8.4 since the $<> generator expressions are not implemented in previous versions.

freedesktop-unofficial-mirror/gstreamer__qt-gstreamer,dejunk/gstreamer,knuesel/qt-gstreamer,GStreamer/qt-gstreamer,knuesel/qt-gstreamer,comicfans/libqtgstreamer,tswindell/qt-gstreamer,ylatuya/qt-gstreamer,comicfans/libqtgstreamer,detrout/qt-gstreamer,iperry/qt-gstreamer,detrout/qt-gstreamer,tswindell/qt-gstreamer,dejunk/gstreamer,detrout/qt-gstreamer,iperry/qt-gstreamer,freedesktop-unofficial-mirror/gstreamer__qt-gstreamer,dejunk/gstreamer,tswindell/qt-gstreamer,GStreamer/qt-gstreamer,nasserGanjali/QtGStreamer,knuesel/qt-gstreamer,GStreamer/qt-gstreamer,freedesktop-unofficial-mirror/gstreamer__qt-gstreamer,comicfans/libqtgstreamer,ylatuya/qt-gstreamer,nasserGanjali/QtGStreamer,iperry/qt-gstreamer,ylatuya/qt-gstreamer,nasserGanjali/QtGStreamer