Allow to neuter array buffer twice in tests.

test/mjsunit/neuter-twice.js

Index: test/mjsunit/neuter-twice.js
diff --git a/test/mjsunit/regress/regress-347912.js b/test/mjsunit/neuter-twice.js
similarity index 71%
copy from test/mjsunit/regress/regress-347912.js
copy to test/mjsunit/neuter-twice.js
index b609e36c3d4981219abcd1c244ab46f849b2863b..3501cee4330f966c1eeaf6f5b7ebdc6418f2bcec 100644
--- a/test/mjsunit/regress/regress-347912.js
+++ b/test/mjsunit/neuter-twice.js
@@ -1,10 +1,9 @@
 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-
+//
 // Flags: --allow-natives-syntax
 
-var __v_4 = {};
-__v_2 = {};
-__v_2[1024] = 0;
-%DebugPrint(__v_4);
+var ab = new ArrayBuffer(100);
+%ArrayBufferNeuter(ab);
+%ArrayBufferNeuter(ab);