Add GLESv1 headers for DDKs that depend on it

Add GLESv1 headers. There are vendor DDKs that rely on both
GLESv1 and v2 headers being available for their build/test even
if we use only GLESv2 at runtime.
This is only a build time dependency so no harm in adding it

BUG=chrome-os-partner:16090
TEST=build and boot on snow

Change-Id: I3ace651156d47f4ede16ff33d1889c92e5bba4f2
Reviewed-on: https://gerrit.chromium.org/gerrit/39127
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Anush Elangovan <anush@chromium.org>
Commit-Ready: Anush Elangovan <anush@chromium.org>
4 files changed