message: build_on_vm.sh: fix gcloud deprecation warning
diff: @@ -136,7 +136,7 @@ gcloud compute ssh "$machine_name" -- bash << EOF
  install/build_release.sh $@
  EOF
  -gcloud compute copy-files "${machine_name}:mod_pagespeed/release/*" ~/release/
  +gcloud compute scp --recurse "${machine_name}:mod_pagespeed/release/*" ~/release/
  if ! $keep_machine; then
  gcloud -q compute instances delete "$machine_name"
  