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

tests/language/optimized_lists_test.dart

Index: tests/language/optimized_lists_test.dart
diff --git a/tests/language/optimized_lists_test.dart b/tests/language/optimized_lists_test.dart
index d92fe3d3b4c6b48b5f772edd650aa79827235c7b..e55fa83a358cdf622b560c64f659f6b7d9573929 100644
--- a/tests/language/optimized_lists_test.dart
+++ b/tests/language/optimized_lists_test.dart
@@ -2,7 +2,7 @@
 // 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 program for correct optimizations related to types fo allocated lists.
-// VMOptions=--optimization-counter-threshold=10
+// VMOptions=--optimization-counter-threshold=10 --no-background-compilation
 
 import "package:expect/expect.dart";