Merge pull request #2509 from BBasile/alias-ass-trait

Update grammar for enhancement 7804

Author: thewilsonator

spec/declaration.dd

@@ -103,6 +103,7 @@ $(GNAME BasicType):
     $(GLINK Typeof) $(D .) $(GLINK IdentifierList)
     $(GLINK TypeCtor) $(D $(LPAREN)) $(GLINK Type) $(D $(RPAREN))
     $(GLINK2 grammar, TypeVector)
+    $(GLINK2 grammar, Traits)
 
 $(GNAME BasicTypeX):
 $(MULTICOLS 5,