tests: Add '-vv' verbose flags to Kokoro/Nightly/Weekly tests

Without this verbose flag, there is no information output on the tests
currently running. Output is only given on the pass/fail status of a
test after completion. This is unhelpful if the tests fail due to a
timeout (e.g., a test has stalled).

The '-vv' verbose flags sets up the TestLib package to output when a
test has started execution. This information can help in figuring out
which test caused a timeout event to occur.

Change-Id: I14e6752d40a7c8d7189211584073ba79c88ed7d5
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/53305
Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
3 files changed