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

tests/language/double_modulo_test.dart

Index: tests/language/double_modulo_test.dart
diff --git a/tests/language/double_modulo_test.dart b/tests/language/double_modulo_test.dart
index d17bcc5e8a3e9380adfc4ee5b5cd08c4d13864e9..54e9fef53c15c48c548515dd8569275b80505920 100644
--- a/tests/language/double_modulo_test.dart
+++ b/tests/language/double_modulo_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.
 // Dart test optimization of modulo operator on Double.
-// VMOptions=--optimization-counter-threshold=10
+// VMOptions=--optimization-counter-threshold=10 --no-background-compilation
 
 import "package:expect/expect.dart";