Used the "power-hello" resource to make an stdlib example script for that resource Change-Id: Ia8a051330e263617aa0e2ef08321d01cfa1093c4 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/68737 Reviewed-by: Boris Shingarov <shingarov@labware.com> Maintainer: Boris Shingarov <shingarov@labware.com> Tested-by: kokoro <noreply+kokoro@google.com>