tests: add GPU Ruby Random tester with WB L2 caches

The current GPU Ruby Random tester tests only test for WT L2 caches,
meaning that some transitions (specific to WB caches) are never
tested.  To help ensure better coverage, this commit adds a separate
test that tests WB GPU L2 caches to the per-checkin and nightly
regressions.

Change-Id: I539ece3b825b9a38630027d947dc11ebef588752
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/69258
Tested-by: kokoro <noreply+kokoro@google.com>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
1 file changed