Update README.md for possible issue with ios configuration (#648)

Author: vonovak

README.md

@@ -724,7 +724,7 @@ To set this up, perform the following steps:
 
     ![Infoplist](https://cloud.githubusercontent.com/assets/116461/15764252/3ac8aed2-28de-11e6-8c19-2270ae9857a7.png)
 
-And that's it! Now when you run or build your app, your staging builds will automatically be configured to sync with your `Staging` deployment, and your release builds will be configured to sync with your `Production` deployment.
+And that's it! Now when you run or build your app, your staging builds will automatically be configured to sync with your `Staging` deployment, and your release builds will be configured to sync with your `Production` deployment. In case you encounter `ld: library not found for ...`, consult [this issue](https://github.com/Microsoft/react-native-code-push/issues/426) for a possible solution.
 
 Additionally, if you want to give them seperate names and/or icons, you can modify the `Product Name` and `Asset Catalog App Icon Set Name` build settings, which will allow your staging builds to be distinguishable from release builds when installed on the same device.