Add ANGLE build overrides.

This will allow ANGLE to use Chromium repos for third_party deps.

Bug: angleproject:3088
Change-Id: I0d8d4c53df780d59fdc97813fb468d0960b18def
Reviewed-on: https://chromium-review.googlesource.com/c/1424397
Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Cr-Commit-Position: refs/heads/master@{#625340}
1 file changed