message: Add machine types people use as host for TF builds.
diff: @@ -14,8 +14,11 @@ def _remote_platform_configure_impl(repository_ctx):
  cpu = "x86_64"
  if "MACHTYPE" in repository_ctx.os.environ:
  machine_type = repository_ctx.os.environ["MACHTYPE"]
  - if machine_type.startswith("ppc"):
  + if (machine_type.startswith("ppc") or
  + machine_type.startswith("powerpc")):
  cpu = "ppc"
  + elif machine_type.startswith("s390x"):
  + cpu = "s390x"
  exec_properties = repository_ctx.attr.platform_exec_properties
  