message: Fix path on other mutex instance
diff: @@ -621,7 +621,7 @@ NONCONCURRENT_TEST(Thread_InterprocessMutexTryLock)
  bool init_done = false;
  auto do_async = [&]() {
  InterprocessMutex m2;
  - m2.set_shared_part(mutex_part, "", mutex_file_name);
  + m2.set_shared_part(mutex_part, path, mutex_file_name);
  CHECK(!m2.try_lock());
  init_done = true;
  