Update suppression for ffmpeg threading issues.

Fixes http://goo.gl/AfBE1

BUG=93932
TEST=none

Review URL: http://codereview.chromium.org/9565037

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@124620 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/tsan/suppressions.txt

@@ -559,11 +559,11 @@
 {
   bug_93932_g
   ThreadSanitizer:Race
+  ...
   fun:frame_thread_free
   ...
   fun:avcodec_close
   ...
-  fun:media::FFmpegVideoDecoder::ReleaseFFmpegResources
 }
 {
   bug_100020