This changes add support for specifying fixtures that download archives and uncompress them to the desired directory. Change-Id: Ib3f6ee111b8d6130200507cbd170ecaf9fb39445 Signed-off-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/18988 Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Jason Lowe-Power <jason@lowepower.com>