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

tests/standalone/int_list_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.
 //
 // Dart Mint representations and type propagation issue.
 // Testing Int32List and Uint32List loads.
 //
-// VMOptions=--optimization-counter-threshold=5 --no-use-osr
+// VMOptions=--optimization-counter-threshold=5 --no-use-osr --no-background-compilation
 
 import 'dart:typed_data';
 import "package:expect/expect.dart";
 
 main() {
   var a = new Uint32List(100);
   a[2] = 3;
   var res = sumIt1(a, 2);
   Expect.equals(3 * 10, res);
   res = sumIt1(a, 2);
@@ skipping 14 matching lines @@
   return sum;
 }
 
 sumIt2(Int32List a, int n) {
   var sum = 0;
   for (int i = 0; i < 10; i++) {
     sum += a[n];
   }
   return sum;
 }