Summary:
`RCTModuleData instance` is the entry-point for creating and initializing NativeModules on iOS. This diff instruments module-create for the legacy NativeModule system.
Changelog: [Internal]
Reviewed By: PeteTheHeat
Differential Revision: D21415435
fbshipit-source-id: 8554e41cba9105ef528a9a63c49042b99ebf8751