message: Adds a note about the update RN specs makefile command
diff: @@ -65,6 +65,7 @@ YOGA_SRC_BEFORE=yoga\/\*\*\/\*.{c,h}
  YOGA_SRC_AFTER=ReactCommon\/yoga\/yoga\/\*\*\/\*.\{c,h\}
  YOGA_MASTER_PODSPEC_URL = "https://raw.githubusercontent.com/facebook/react-native/master/ReactCommon/yoga/yoga.podspec"
  +# This is only needed if you're updating React Native
  update_specs_repos:
  ifndef JQ
  $(error "Please install jq before running `brew install jq`")
  