configure.ac: Patch properly. Update version.

configure.ac: Patch properly. Update version.

Original commit message from CVS:
* configure.ac:
Patch properly. Update version.
* gst-libs/ext/ffmpeg/Makefile.am:
Comment out patching - all handled by configure.
* gst-libs/ext/ffmpeg/Tag:
Update version.
* gst-libs/ext/ffmpeg/patch/autotools.diff:
Some small updates to improve compiling.
* gst-libs/ext/ffmpeg/patch/functions.diff:
Update date.
* gst-libs/ext/ffmpeg/patch/matroska.diff:
Newer patch - see ffmpeg-devel mailinglists.
* gst-libs/ext/ffmpeg/patch/function.patch:
Remove old cruft.
* gst-libs/ext/ffmpeg/patch/disabletools.diff:
Now handled by --disable-... in configure.