Fix lint in local-cli

Reviewed By: cpojer

Differential Revision: D4166993

fbshipit-source-id: 9a8249175d98b42d7557817846d8c09c9769485e

local-cli/bundle/unbundle.js

@@ -6,6 +6,7 @@
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
  */
+'use strict';
 
 const bundleWithOutput = require('./bundle').withOutput;
 const bundleCommandLineArgs = require('./bundleCommandLineArgs');