GL: Make sure primitive restart emulation is disabled below GL 3.1 If the GL driver version is below 3.1, we cannot set the primitive restart fixed index (ES3 wont be supported anyway). Make sure the feature is disabled. Speculative fix for crbug.com/1073020 BUG=chromium:1073020 BUG=angleproject:3997 Change-Id: I67756b377aa951da2e70c26f7db978ede9010586 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2159289 Commit-Queue: Geoff Lang <geofflang@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>