[#30198] Added asset entry when installing component from discovery

When installing a component via discover_install the correspondent entry in table #__assets is not created.

**How to reproduce the problem and/or test the patch::**
Install any component that creates an asset entry on normal install via discover install and check whether there is an entry for that component in #__assets.



Fixes http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_item_id=30198