The compiled libavcodec/tests/codec_desc was left out of that dir's
.gitignore when the test was added, so it shows up in 'git status'
as an untracked file if it's been built.
Signed-off-by: FeRD (Frank Dana) <ferdnyc@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>