message: [Process] Lock GetSwiftLanguageRuntime() as we do for the other langs.
diff: @@ -1889,9 +1889,7 @@ ObjCLanguageRuntime *Process::GetObjCLanguageRuntime(bool retry_if_null) {
  }
  SwiftLanguageRuntime *Process::GetSwiftLanguageRuntime(bool retry_if_null) {
  - if (!IsValid())
  - return NULL;
  -
  + std::lock_guard<std::recursive_mutex> guard(m_language_runtimes_mutex);
  LanguageRuntime *runtime =
  GetLanguageRuntime(eLanguageTypeSwift, retry_if_null);
  if (runtime != NULL && runtime->GetLanguageType() == eLanguageTypeSwift)
  