[build] Suppress implicit conversion errors

This change suppress implicit conversion errors in ffmpeg to unblock
the build.

Bug: 62466
Change-Id: I1dc2fcef61e584cb2037762055687ad7be62bcdf
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/yasm/+/441916
Reviewed-by: Petr Hosek <phosek@google.com>
1 file changed