Summary:
NVM started failing on Travis
Closes https://github.com/facebook/react-native/pull/7411

Differential Revision: D3265199

fb-gh-sync-id: 6c80210cafb0ec6510073ce913a36eb7edcac2c6
fbshipit-source-id: 6c80210cafb0ec6510073ce913a36eb7edcac2c6