Will be used to have regres switch to LLVM 10.

Change-Id: Ia425e5d357f4877c5608b9afc89d659ebb38f701
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/43110Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Ben Clayton <bclayton@google.com>