scripts: Handle gst-python in gst-uninstalled
scripts: Handle gst-python in gst-uninstalled

https://bugzilla.gnome.org/show_bug.cgi?id=709082

surround-io/gstreamer,surround-io/gstreamer,surround-io/gstreamer,surround-io/gstreamer,jpakkane/gstreamer,surround-io/gstreamer,jpakkane/gstreamer,jpakkane/gstreamer,jpakkane/gstreamer,jpakkane/gstreamer