ERROR: Can't find config file: app/js/jshintrc.json

I have this error message : 

```
Running "jshint:build" (jshint) task
ERROR: Can't find config file: app/js/jshintrc.json
```

In `Gruntfile.js` L184 :

```
options: {
          jshintrc: '<%= cvars.app %>/js/jshintrc.json'
        },
```

Should i create this file manualy ? or should this option point to `.jshintrc` ?
