Summary:
Fixes#22873. Given that this code is meant to only work on macOS, we should be fine not using a portable hash. In the packages for which this matters at the bottom of this file, it produces the same hashes so it should be fine.
[General] [Fixed] - Don't use `-p` when invoking shasum.
Pull Request resolved: https://github.com/facebook/react-native/pull/24036
Differential Revision: D14521134
Pulled By: cpojer
fbshipit-source-id: 882e762b7817d9d46bdd405c9e2e9e8b4d7cfaf4