whichRP is replaced by suchRP to match closely the English grammar

lib/resource/bulgarian/RelativeBul.gf

@@ -4,7 +4,7 @@ concrete RelativeBul of Relative = CatBul ** open ResBul in {
 
   lin
     RelCl cl = {
-      s = \\t,a,p,gn => whichRP ! gn ++ cl.s ! t ! a ! p ! Main ; 
+      s = \\t,a,p,gn => suchRP ! gn ++ "֌" ++ cl.s ! t ! a ! p ! Main ; 
       role = RSubj
       } ;
 

lib/resource/bulgarian/ResBul.gf

@@ -528,4 +528,12 @@ resource ResBul = ParamX ** open Prelude in {
                 GSg Neut => "êîåòî" ;
                 GPl      => "êîèòî"
               } ;
+
+    suchRP : GenNum => Str
+           = table {
+               GSg Masc => "òàêúâ" ;
+               GSg Fem  => "òàêàâà" ;
+               GSg Neut => "òàêîâà" ;
+               GPl      => "òàêèâà"
+             } ;
 }