added Extend modules for Hindi, Urdu, Mongolian

src/urdu/ExtendUrd.gf

@@ -0,0 +1,11 @@
+--# -path=.:../common:../abstract
+
+concrete ExtendUrd of Extend =
+  CatUrd ** ExtendFunctor -
+  [
+    ComplDirectVQ, ComplDirectVS
+   ]
+  with
+    (Grammar = GrammarUrd) ** {
+
+}