Doing a test run with LLVM after the one with Subzero results in various
tests timing out (including some 'UNSUPPORTED' ones). The Subzero test
run doesn't exhibit this issue. It's unclear at this point why this
happens, but reversing the order appears to stabilize it.

Bug: b/156728197
Change-Id: I6450d2d95d6043ef206d09f0020313fbf4b3f2e2
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/45149Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Kokoro-Result: kokoro <noreply+kokoro@google.com>