Slightly change the way we set this up. Ugly, but now it works again. This baby is looking for a proper fix.

Original commit message from CVS:
* configure.ac:
* gst-libs/ext/ffmpeg/Makefile.am:
Slightly change the way we set this up. Ugly, but now it works
again. This baby is looking for a proper fix.
* gst-libs/ext/ffmpeg/Tag:
Apparently CVS and me disagree on the tag... Ohwell, CVS wins.
* gst-libs/ext/ffmpeg/patch/autotools.diff:
* gst-libs/ext/ffmpeg/patch/disableinstalllibs.diff:
Slight nag on a link between lavf/lavc in ffmpeg. Not really
important for us since the code is the same in the end, but this
is actually correct from a per-patch point-of-view...