Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

Each fate-seek test depends now only on the corresponding fate-acodec,
fate-vsynth2 or fate-lavf test which creates the file seek-tests
operates on. The tests and references are renamed to match the test they
depend on.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Originally committed as revision 24345 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 22158 to svn://svn.ffmpeg.org/ffmpeg/trunk