Summary:
This fix is ported from 0.64-stable. It moves the Node resolution script from react-native-xcode.sh to find-node.sh for re-use in the codegen.
Changelog: [Codegen][Internal]
Reviewed By: fkgozali
Differential Revision: D27437216
fbshipit-source-id: ecb8a7a30411a709c095a0a34115b6dc48b99f1e
Héctor Ramos