Try and catch memory corruption in our unit tests.

Change-Id: I5712c443de002ca563ba474cb77451d2791e7ec0
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/30169Tested-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>