This will enable running Reactor tests both with the LLVM and Subzero
backend for maximum coverage.

Bug: b/173404759
Change-Id: I43ff938924ccf864583fbf455141d7937998f754
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/50388Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Kokoro-Result: kokoro <noreply+kokoro@google.com>