[tests] add tests for "yield" as function name

test/message/nf-yield-strict-in-generator.js

Index: test/message/nf-yield-strict-in-generator.js
diff --git a/test/message/super-in-function.js b/test/message/nf-yield-strict-in-generator.js
similarity index 75%
copy from test/message/super-in-function.js
copy to test/message/nf-yield-strict-in-generator.js
index f2e2342c31b9a3ba001555bcf484d0c773fbb79e..7e87881bedcf696cf1c2156d3cad7fadc4c6a02b 100644
--- a/test/message/super-in-function.js
+++ b/test/message/nf-yield-strict-in-generator.js
@@ -2,9 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
-'use strict';
-
-function f() {
-  super.x();
+function* gen() {
+  "use strict";
+  function yield() {}
 }