These were added for the .gn build, but were never enabled for the CMake build.

Test these as part of the Kokoro presubmits.

Bug: b/153193374
Change-Id: I36e7428bfe1a4867bea39b2fbb302aed6c3dff7b
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/43488
Kokoro-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Ben Clayton <bclayton@google.com>