Add an alias for React Native Link command (#5491)

plugins/react-native/react-native.plugin.zsh

@@ -3,4 +3,5 @@ alias rnios4s='react-native run-ios --simulator "iPhone 4s"'
 alias rnios5='react-native run-ios --simulator "iPhone 5"'
 alias rnios5s='react-native run-ios --simulator "iPhone 5s"'
 alias rnios='react-native run-ios'
+alias rnlink='react-native link'