Tweak Hot Loading yellow box wording

Summary: Users don't know what an accept callback is. Lets be more explicit on what type of modules we currently support hot loading.

Reviewed By: weicool

Differential Revision: D2945438

fb-gh-sync-id: d0fc228ab23833371f8fbbd86ed18e81c8ba0ebf
shipit-source-id: d0fc228ab23833371f8fbbd86ed18e81c8ba0ebf

packager/react-packager/src/Resolver/polyfills/require.js

@@ -118,8 +118,8 @@ if (__DEV__) { // HMR
       mod.module.hot.acceptCallback();
     } else {
       console.warn(
-        '[HMR] Module `' + id + '` can\'t be hot reloaded because it ' +
+        '[HMR] Module `' + id + '` can\'t be hot reloaded because it\'s not a ' +
-        'doesn\'t provide accept callback hook. Reload the app to get the updates.'
+        'React component. To get the changes reload the JS bundle.'
       );
     }
   }