This is for reproducible build of angle related libraries.

Bug: 828669
Change-Id: I807c8fb01b976f6e7a71477ee934b9e0b0cdc684
Reviewed-on: https://chromium-review.googlesource.com/1164814Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Frank Henigman <fjhenigman@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>