website: Add a blog post on linux boot tests with gem5-19

Change-Id: I02bced3f985a6d84e0f6e8c2ff7c6f348f88388f
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5-website/+/26523
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
6 files changed