Summary:
The script was moved after the original ShellCheck PR was opened, and this was lost during the rebase.
Pull Request resolved: https://github.com/facebook/react-native/pull/21443
Differential Revision: D10133498
Pulled By: hramos
fbshipit-source-id: da61b782362ab2d13cb6f0bca3fb1c9a0af08ae5