Summary:
Fixes#9312
(Sorry for inconvenience, could've been removed by mistake!)
Bonus: projectName can be configured rather than always defaulting to package.json name, not sure if helpful, but just added it since we have a `default` function that makes sense in this case.
Closes https://github.com/facebook/react-native/pull/9525
Differential Revision: D3753610
Pulled By: bestander
fbshipit-source-id: 641872855b9865502f4055910262686edc4b504e
Mike Grabowski