Summary:
The command `react-native run-ios --simulator "iPhone 4s"` wasn't working, and I think it's because there needs to be an equals sign in the command. ie. `react-native run-ios --simulator="iPhone 4s"`
I ran that command again, and it worked for me.
Closes https://github.com/facebook/react-native/pull/10754
Differential Revision: D4175849
Pulled By: hramos
fbshipit-source-id: b11aee955f1f83da2d72e0cb06464ea984cf2002