Add React Native aliases for logs (#5756)

plugins/react-native/README.md

@@ -24,3 +24,6 @@ plugins=(... react-native)
 | **rnios5s** | `react-native run-ios --simulator "iPhone 5s"` |
 | **rnios6**  | `react-native run-ios --simulator "iPhone 6"`  |
 | **rnios6s** | `react-native run-ios --simulator "iPhone 6s"` |
+| _Logging_                                                    |
+| **rnland**  | `react-native log-android`                     |
+| **rnlios**  | `react-native log-ios`                         |

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

@@ -9,3 +9,6 @@ alias rnios5='react-native run-ios --simulator "iPhone 5"'
 alias rnios5s='react-native run-ios --simulator "iPhone 5s"'
 alias rnios6='react-native run-ios --simulator "iPhone 6"'
 alias rnios6s='react-native run-ios --simulator "iPhone 6s"'
+
+alias rnland='react-native log-android'
+alias rnlios='react-native log-ios'