Include harmony-string-padding.js in the context snapshot

test/mjsunit/harmony/harmony-string-pad-end.js

Index: test/mjsunit/harmony/harmony-string-pad-end.js
diff --git a/test/mjsunit/harmony/harmony-string-pad-end.js b/test/mjsunit/harmony/harmony-string-pad-end.js
index 03e5aeacdb491453f40ca2b1534f3dcc457f9e95..a218a8ae6f34179affe760f756e1222d52cf9cd9 100644
--- a/test/mjsunit/harmony/harmony-string-pad-end.js
+++ b/test/mjsunit/harmony/harmony-string-pad-end.js
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --harmony-string-padding
-
 (function TestMeta() {
   assertEquals(1, String.prototype.padEnd.length);
   assertEquals("function", typeof String.prototype.padEnd);