[Packager] doesn't resolve modules that are symlinks

Problem

As described in the browserify handbook you can use symlinks in the `node_modules` folder to reference modules. This is mainly useful for preventing `../../../../` requires. With a symlink setup from the project root setup like: `ln -s src/app node_modules/app` in any file in the project you can: [code block] However, the packager can't resolve them: `Requiring unkonwn module "app"`. Edit: Check out this repo to easily reproduce the error above: https://github.com/JaapRood/react-native-packager-symlink-bug