Added groupCollapsed polyfill (facebook#21457)

Summary:
`groupCollapsed` is used to group logs but collapsed which is very useful when the console has many logs (e.g. when using `redux-logger`).

For developers who prefer to debug iOS apps using Safari JSC, the `groupCollapsed` was not polyfilled.

Fixes facebook#21446
Pull Request resolved: facebook#21457

Differential Revision: D13761796

Pulled By: cpojer

fbshipit-source-id: e7c4f1ff4728c6a7f6ffd6cc629f7fbc1aa67e87

Author: Eyesonly88

Libraries/polyfills/console.js

@@ -509,6 +509,11 @@ function consoleGroupPolyfill(label) {
   groupStack.push(GROUP_PAD);
 }
 
+function consoleGroupCollapsedPolyfill(label) {
+  global.nativeLoggingHook(groupFormat(GROUP_CLOSE, label), LOG_LEVELS.info);
+  groupStack.push(GROUP_PAD);
+}
+
 function consoleGroupEndPolyfill() {
   groupStack.pop();
   global.nativeLoggingHook(groupFormat(GROUP_CLOSE), LOG_LEVELS.info);
@@ -534,6 +539,7 @@ if (global.nativeLoggingHook) {
     table: consoleTablePolyfill,
     group: consoleGroupPolyfill,
     groupEnd: consoleGroupEndPolyfill,
+    groupCollapsed: consoleGroupCollapsedPolyfill,
   };
 
   // If available, also call the original `console` method since that is