xsession: depend on ofono

Scripts that get installed to xsession (like connui-conndlgs) require
ofono to be running, or the entire xsession will block indefinitely
(on startup-pin-query in this case).

Not sure what ultimately the clean solution would be.

debian/maemo-system-services.xsession.init

@@ -3,7 +3,7 @@
 description="starting Xsession"
 
 depend() {
-	need xorg mce
+	need xorg mce ofono
 	keyword -timeout
 }