This matches what's done in Chromium and was found while trying
to add a build override for VulkanMemoryAllocator.

Bug: tint:700
Bug: chromium:1195554
Change-Id: I50e71fb985169a89c03623b0959f57d5e43bb91a
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2807714
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>