We were missing the entries in the def file, and we were missing two
new entry point functions from the new header. This fixes linking
against dEQP.

BUG=angle:901

Change-Id: I56d35bb6e8f3bd9e26943eaec196034605e154fc
Reviewed-on: https://chromium-review.googlesource.com/244444Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>