Add missing GST_LIBS to the link flags
Add missing GST_LIBS to the link flags

Original commit message from CVS:
* ext/lame/Makefile.am:
* ext/mpeg2dec/Makefile.am:
* gst/dvdlpcmdec/Makefile.am:
* gst/dvdsub/Makefile.am:
* gst/mpegaudioparse/Makefile.am:
Add missing GST_LIBS to the link flags

StreamUtils/gst-plugins-good,pexip/gst-plugins-good,GStreamer/gst-plugins-good,GStreamer/gst-plugins-good,GrokImageCompression/gst-plugins-good,pexip/gst-plugins-good,GrokImageCompression/gst-plugins-good,GrokImageCompression/gst-plugins-good,pexip/gst-plugins-good,StreamUtils/gst-plugins-good,GrokImageCompression/gst-plugins-good,StreamUtils/gst-plugins-good,StreamUtils/gst-plugins-good,pexip/gst-plugins-good,GStreamer/gst-plugins-good,GStreamer/gst-plugins-good,pexip/gst-plugins-good