The dEQP tests cannot be turned on before immediate data for drawElements
is supported.

Bug:angleproject:2364

Change-Id: Id5fd6fbc0c74f2dba08341f36ca0091d540f4ed8
Reviewed-on: https://chromium-review.googlesource.com/951402Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Luc Ferron <lucferron@chromium.org>