Make it possible to use the run bisect sub command. As with all
other ffbisect commands, revisions that do not contain the needed
tools are skipped.
Signed-off-by: Alexander Strasser <eclipse7@gmx.net>
This script works like "git bisect" except that you can
specify with "bisect need ffmpeg|ffplay|ffserver|ffprobe" which tool(s)
are needed for testing a checkout
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>