message: mac: Pull arm64 gn binary on M1 hosts.
  See
  for a full explanation (WebRTC is just following Chromiium on this).
  Cr-Commit-Position: refs/heads/master@{#32893}
diff: @@ -46,7 +46,7 @@ deps = {
  'src/buildtools/mac': {
  'packages': [
  {
  - 'package': 'gn/gn/mac-amd64',
  + 'package': 'gn/gn/mac-${{arch}}',
  'version': 'git_revision:0d67e272bdb8145f87d238bc0b2cb8bf80ccec90',
  }
  ],
  