fixup! [M47_2526] Chromium upversion to m47_2526 branch

fixup! [M47_2526] Chromium upversion to m47_2526 branch

Add arm64 support to ffmpeg

We need to regenerate this arm64 support patch in ffmpeg
until ffmpeg supports arm64 architecture in mainstream.

The following commands were executed within arm64 GBS wayland chroot:

[1] Enter chroot
$ gbs chroot --root ~/GBS-ROOT/local/BUILD-ROOTS/scratch.aarch64.0/

[2] Copy over src/third_party/ffmpeg to chroot (e.g.: /home/abuild)
$ cp -rf src/third_party/ffmpeg
~/GBS-ROOT/local/BUILD-ROOTS/scratch.aarch64.0/home/abuild/

[3] Execute the below comment in ffmpeg directory
$ cd ffmpeg
$ ./chromium/scripts/build_ffmpeg.py linux arm64
$ ./chromium/scripts/copy_config.sh
$ python chromium/scripts/generate_gyp.py

[4] Edit ffmpeg.gyp; add "asm_sources" to the build

[5] Generate the patch against a unchanged ffmpeg copy

This patch referred to http://165.213.202.130/gerrit/#/c/80261

Bug: http://web.sec.samsung.net/bugzilla/show_bug.cgi?id=14507

Reviewed by: a1.gomes, sns.park

Change-Id: I238cb36c294e27d9dce3a163a7a41c474d5f2360
Signed-off-by: Youngcheol Kang <ychul.kang@samsung.com>