The change configures shaders to be of a compatible spec upon creation.

BUG=angleproject:1523

Change-Id: Id345d0b8f0abad8ed3c4fb3117d0fdfeab9fea53
Reviewed-on: https://chromium-review.googlesource.com/405778
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>