GL: Fix 64-bit caps query on older GL drivers. GetInteger64v wasn't introduced until GL 3.2, but some of the enums for caps that are 64-bit in 3.2 (eg, max uniform block size) were first introduced as 32-bit values in extensions. This comes up when trying to use RenderDoc's OpenGL simulator, since it exposes some relevant extensions and only uses core version 3.1. BUG=None Change-Id: Ie4be71b5c8656aae0fe08c270a53f5ef86c99710 Reviewed-on: https://chromium-review.googlesource.com/599030 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>