stdlib: added SimPoint Class to stdlib

Added SimPoint Class to store workload needed SimPoints information.
It stores SimPoints starting instructions, SimPoints interval, SimPoints weight,
and warmup length for each SimPoint.

Jira Issue: https://gem5.atlassian.net/browse/GEM5-1259

Change-Id: I47e4dc0c98801d42acef9b7ccbb629401c61ca40
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/63132
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
2 files changed