RN: Expose unstable_batchedUpdates on react-native

Reviewed By: spicyj

Differential Revision: D5284484

fbshipit-source-id: bdc0a1c3babfa1a5c3343f084bdd5d4ff4f2d46a

Author: yungsters

Libraries/react-native/react-native-implementation.js

@@ -97,6 +97,7 @@ const ReactNative = {
   get TimePickerAndroid() { return require('TimePickerAndroid'); },
   get TVEventHandler() { return require('TVEventHandler'); },
   get UIManager() { return require('UIManager'); },
+  get unstable_batchedUpdates() { return require('ReactNative').unstable_batchedUpdates; },
   get Vibration() { return require('Vibration'); },
   get VibrationIOS() { return require('VibrationIOS'); },