Revert "Remove the self reference in the seektest that prevented it from"

This reverts r22151.  It prevents the seektest from running at all and
is thus of no use whatsoever.

Originally committed as revision 22152 to svn://svn.ffmpeg.org/ffmpeg/trunk

tests/seek-regression.sh

@@ -11,7 +11,7 @@ datadir="tests/data"
 logfile="$datadir/seek.regression"
 reffile="$1"
 
-list=$(grep -oh ' ./tests/data/.*' tests/ref/{acodec,lavf,vsynth1}/*| sort)
+list=$(grep '^tests/data/[ab]-' "$reffile")
 rm -f $logfile
 for i in $list ; do
     echo ---------------- >> $logfile