Keep symbolic links in zip
Keep symbolic links in zip

The files in ```vendor/bin``` or symbolic linked.

Use the -y  for ```zip``` will keep the symbolic links.

Otherwise this will produce an error:
```sh
php laravel new test-app
cd test-app/vendor/bin
php ./phpunit
```
CoreProc/kitchen-laravel-installer,CoreProc/kitchen-laravel-installer,laravel/installer