Roll src/third_party/ffmpeg/ e61dd757a..6d9096c9e (546 commits)

https://chromium.googlesource.com/chromium/third_party/ffmpeg.git/+log/e61dd757a8c0..6d9096c9e3f7

$ git log e61dd757a..6d9096c9e --date=short --no-merges --format='%ad %ae %s'
2020-10-02 cassew Roll FFMPEG 2-10-20
2020-09-30 andreas.rheinhardt avformat/movenc: Fix stack overflow when remuxing timecode tracks
2020-09-24 andreas.rheinhardt avcodec/utils: Reindentation
2020-09-26 andreas.rheinhardt avcodec/utils: Also free encoder extradata on avcodec_open2() error
2020-09-24 andreas.rheinhardt avcodec/utils: Don't forget cleaning up when allocating priv_data fails
(...)
2020-08-27 onemda avfilter/af_arnndn: use memcpy for copying in compute_rnn()
2020-08-27 onemda avfilter/af_arnndn: use scalarproduct_float() in dct function
2020-08-27 onemda avfilter/af_compensationdelay: always initialize w_ptr with 0
2020-08-27 onemda avfilter/vf_xfade: do not use alpha for average rgb color
2020-08-27 onemda avfilter/vf_xfade: add corner wipe transforms

Created with:
  roll-dep src/third_party/ffmpeg

Bug: 1119808
Change-Id: I5a81b04f9f890214b5f7cce5e103d7fbf868d90e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2469044
Commit-Queue: Will Cassella <cassew@google.com>
Reviewed-by: Xiaohan Wang <xhwang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#817237}

DEPS

@@ -925,7 +925,7 @@ deps = {
   },
 
   'src/third_party/ffmpeg':
-    Var('chromium_git') + '/chromium/third_party/ffmpeg.git' + '@' + 'e61dd757a8c09139c03ffa2ef285d5678909370a',
+    Var('chromium_git') + '/chromium/third_party/ffmpeg.git' + '@' + '6d9096c9e3f7f5d4e6528104ed77987ec9327315',
 
   'src/third_party/flac':
     Var('chromium_git') + '/chromium/deps/flac.git' + '@' + 'af862024c8c8fa0ae07ced05e89013d881b00596',