Add issue numbers to language tests status files

tests/language/vm/issue11087_vm_test.dart

 // Copyright (c) 2013, 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.
 
 // Regression test for VM's IfConverted pass not keeping graph structure and
 // use lists in sync.
 
 // VMOptions=--optimization-counter-threshold=10
 
 class A {
   int x;
 }
 
 f() {
   var a = new A();
   a.x = (true ? 2 : 4);
   return a.x;
 }
 
 main() {
   for (var i = 0; i < 20; i++) f();
 }