SistemUI: updated romanian translation

this should fix this :

https://www.dropbox.com/s/m44e9ssroszz8bt/Screenshot_2013-01-22-23-34-07.png

Change-Id: I5880f041d6cb1eada3039e6d667e4c3aa333e7b0
Signed-off-by: Johnnyslt <johnny@esi.ro>