tests: Add Simpoints example scripts as tests

These both ensure these example scripts still work as intended and
provides tests for the stdlib Simpoint API.

Change-Id: I549c3d22458a5013a335857c83a4e78dc425e37d
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/63931
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
2 files changed