message: Adding copyright headers to e2e/override-globals/setup.js
  'nuff said.
diff: +/**
  + * Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
  + *
  + * This source code is licensed under the MIT license found in the
  + * LICENSE file in the root directory of this source tree.
  + *
  + * @flow
  + */
  +
  Date.now = () => 0;
  process.hrtime = () => [0, 5000];
  