Add target_arch=arm64 support.

Currently only adding jsimd_none.c to get things building.

BUG=354405
R=wangxianzhu@chromium.org

Review URL: https://codereview.chromium.org/210933002

git-svn-id: http://src.chromium.org/svn/trunk/deps/third_party/libjpeg_turbo@259566 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
1 file changed