Fix upload.js, error uploading application due to invalid parameter.

[juliandavidmr]

When the jar parameter is undefined then an error occurs:

Uploading app...

An error occurred uploading the build:
TypeError: Cannot read property 'map' of undefined
TypeError: Cannot read property 'map' of undefined
    at Object.getDirectUploadKey (/usr/lib/node_modules/ionic/node_modules/ionic-app-lib/lib/upload.js:272:18)
....

After fixing it looks like this:

Uploading app...

There was an error trying to load your app. :(

• The error is exactly the following code snippet:

       //==> var 'jar' is undefined
      cookie: jar.map(function(c) {
        return c.key + '=' + encodeURIComponent(c.value);
      }).join('; ')