Add issue numbers to language tests status files

tests/language/vm/load_to_load_forwarding_vm_test.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 // Test correctness of side effects tracking used by load to load forwarding.
 
 // VMOptions=--optimization-counter-threshold=10
 
 import "package:expect/expect.dart";
 import "dart:typed_data";
 
@@ skipping 223 matching lines @@
   for (var i = 0; i < 20; i++) {
     testPhiConvertions(true, u32List);
     testPhiConvertions(false, u32List);
   }
 
   final escape = new List(1);
   for (var i = 0; i < 20; i++) {
     fakeAliasing(escape);
   }
 }