message: Fix a typo in XlaConfigProxy.
diff: @@ -22,7 +22,7 @@ OptimizerOptions::GlobalJitLevel XlaConfigProxy::GetGlobalJitLevel(
  OptimizerOptions::GlobalJitLevel jit_level_in_session_opts) {
  OptimizerOptions::GlobalJitLevel global_jit_level = jit_level_in_session_opts;
  ConfigSetterRegistry<OptimizerOptions::GlobalJitLevel>::Global()->Update(
  - jit_level_in_session_opts);
  + global_jit_level);
  return global_jit_level;
  }
  