Add ExtendTur to the list of modules

src/turkish/AllTur.gf

@@ -1,6 +1,6 @@
 --# -path=.:../abstract:../common:../prelude
 
 concrete AllTur of AllTurAbs = 
-  LangTur
---  ,ExtendTur
+  LangTur,
+  ExtendTur
   ** {} ;