Put function argument last in sort function. Fixes #3265.

src/libsyntax/attr.rs

@@ -281,7 +281,7 @@ fn sort_meta_items(+items: ~[@ast::meta_item]) -> ~[@ast::meta_item] {
 
     // This is sort of stupid here, converting to a vec of mutables and back
     let v: ~[mut @ast::meta_item] = vec::to_mut(items);
-    std::sort::quick_sort(lteq, v);
+    std::sort::quick_sort(v, lteq);
     vec::from_mut(move v)
 }