These will be filled out in later changes. This CL just adds the plumbing to the build script. Change-Id: If58ea023d0c85eae0160f88217c83fca70346da2 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/27688 Maintainer: Gabe Black <gabeblack@google.com> Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>