test: Add tests for multiple outer attributes on items

Issue #487

src/test/run-pass/item-attributes.rs

@@ -1,5 +1,7 @@
 // xfail-stage0
 
+mod test_single_attr_outer {
+
   #[attr = "val"]
   const int x = 10;
 
@@ -17,5 +19,33 @@ type t = obj { };
   #[attr = "val"]
   obj o() { }
 
+}
+
+mod test_multi_attr_outer {
+
+  #[attr1 = "val"]
+  #[attr2 = "val"]
+  const int x = 10;
+
+  #[attr1 = "val"]
+  #[attr2 = "val"]
+  mod mod1 {
+  }
+
+  #[attr1 = "val"]
+  #[attr2 = "val"]
+  native "rust" mod rustrt {
+  }
+
+  #[attr1 = "val"]
+  #[attr2 = "val"]
+  type t = obj { };
+
+  #[attr1 = "val"]
+  #[attr2 = "val"]
+  obj o() { }
+
+}
+
 fn main() {
 }