message: Fix NetBsd build broken by r323637
diff: @@ -135,7 +135,7 @@ NativeProcessNetBSD::Factory::Attach(
  std::unique_ptr<NativeProcessNetBSD> process_up(new NativeProcessNetBSD(
  pid, -1, native_delegate, Info.GetArchitecture(), mainloop));
  - status = process_up->Attach();
  + Status status = process_up->Attach();
  if (!status.Success())
  return status.ToError();
  