Add --no-background-compilation to tests that expect to run code in optimized form

tests/language/vm/regress_22541_vm_test.dart

 // Copyright (c) 2015, 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 range inference for multiplication of two negative values.
-// VMOptions=--optimization-counter-threshold=10 --no-use-osr
+// VMOptions=--optimization-counter-threshold=10 --no-use-osr --no-background-compilation
 
 import 'package:expect/expect.dart';
 
 test(a) {
   var x = a ? -1 : -2;
   if (0 < (x * x)) {
     return "ok";
   } else {
     return "fail";
   }
 }
 
 main() {
   for (var j = 0; j < 20; j++) {
     Expect.equals("ok", test(false));
   }
 }