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This will allow moving the SwiftShader Vulkan module to the root
out folder. This in turn will enable more easily running TSAN and
ASAN testers.

Bug: angleproject:3876
Bug: angleproject:3912
Bug: b/140251624
Change-Id: I3ed8598ca396a445f46d5cddc4d19f997f4e61f8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1811317Reviewed-by: Peng Huang <penghuang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Cr-Commit-Position: refs/heads/master@{#697749}