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

tests/language/instance_incr_deopt_test.dart

 // Copyright (c) 2011, 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 --no-use-osr
+// VMOptions=--optimization-counter-threshold=10 --no-use-osr --no-background-compilation
 
 import "package:expect/expect.dart";
 
 // Check correct deoptimization of instance field increment.
 
 
 main() {
   var a = new A();
   var aa = new A();
   for (int i = 0; i < 20; i++) {
@@ skipping 33 matching lines @@
     f++;
   }
   var f;
 }
 
 class B {
   B() : f = 0;
   var f;
 }