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

tests/language/vm/regress_22480_test.dart

 // Copyright (c) 2014, 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.
-// VMOptions=--optimization_counter_threshold=10
+// VMOptions=--optimization_counter_threshold=10 --no-background_compilation
 
 import 'package:expect/expect.dart';
 
 test(j) {
   var result = true;
   j++;
   for (var i = 0; i < 100; i++) {
     result = (i < 50 || j < (1 << 32)) && result;
   }
   return result;
 }
 
 main() {
   Expect.isTrue(test(30));
 }