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.

First part disables Vulkan and rolls the layers. The second part will
re-enable Vulkan with the updated loader/layers build.

Bug: angleproject:2237

Change-Id: I112521541ea66b26eadeb959852418dc91be2e18
Reviewed-on: https://chromium-review.googlesource.com/805417Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>