add separate errors for out-of-place associated consts and types

Previously, these would both be labeled as methods.

src/test/compile-fail/trait-impl-can-not-have-untraitful-items.rs

@@ -8,9 +8,13 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#![feature(associated_consts)]
+
 trait A { }
 
 impl A for isize {
+    const BAR: () = (); //~ ERROR const `BAR` is not a member of trait `A`
+    type Baz = (); //~ ERROR type `Baz` is not a member of trait `A`
     fn foo(&self) { } //~ ERROR method `foo` is not a member of trait `A`
 }