added Question.AdvIAdv and correcponding entry of mkIAdv in API

lib/src/romanian/QuestionRon.gf

@@ -100,11 +100,11 @@ concrete QuestionRon of Question =
       n = n
       } ;
 
-
+    AdvIAdv i a = {s = i.s ++ a.s} ;
 
     CompIAdv a = {s = \\_  => a.s} ;
 
     CompIP p = {s = \\_  => p.s ! No} ;
 
 
-}
+}