Roll Vulkan validation layers. Includes fix for incorrectly guarded gcc-specific pragma. https://github.com/KhronosGroup/Vulkan-LoaderAndValidationLayers/pull/1301 BUG=angleproject:1668 Change-Id: Iee60d5f7fbfa7c6d35c0085f0905dcb2e0987188 Reviewed-on: https://chromium-review.googlesource.com/423266 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Frank Henigman <fjhenigman@chromium.org>