Add webm compile i686-linux-clang builders

Change-Id: I902b51fa10af638f3a8948508c4f4cf0abd5c96c

Bug: b:185520494
Change-Id: I08a56341e9ae6ad35519664f1f61619ed34b1607
Reviewed-on: https://chromium-review.googlesource.com/c/codecs/infra/+/3313946
Commit-Queue: Roberto Alanis Baez <alanisbaez@google.com>
Reviewed-by: James Zern <jzern@google.com>
5 files changed