Add LUMA format entries into the tables in formatutilsgl. BUG=angleproject:884 Change-Id: Ie4f378bc18cda57a91c16832c33f0ddc81f9c105 Reviewed-on: https://chromium-review.googlesource.com/298483 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Corentin Wallez <cwallez@chromium.org> Tested-by: Geoff Lang <geofflang@chromium.org>