This hasn't been updated in a while, so there are many changes.
It should also include better validation for memory barriers.

Also includes updated builds for SPIRV Tools and glslang.
A few pull requests need to land before landing this in ANGLE.

This second step re-enables Vulkan and includes the updated build.

Includes a workaround for parameter_validation.h no longer being
auto-generated, and the stale file clobbering the build.

Also includes a fix for an incorrect memory barrier.

Bug: angleproject:2237
Change-Id: Iae611764870281ed6aa7b187ec0c4e44226c722a
Reviewed-on: https://chromium-review.googlesource.com/759197
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Frank Henigman <fjhenigman@chromium.org>