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

tests/language/try_catch_osr_test.dart

 // Copyright (c) 2013, 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
 
 // Test OSR in different places of a try-catch.
 
 import "package:expect/expect.dart";
 
 maythrow(x) {
   try {
     if (x == null) throw 42;
     return 99;
   } finally { }
@@ skipping 78 matching lines @@
   return s;
 }
 
 main() {
   Expect.equals(211, f1());
   Expect.equals(19, f2());
   Expect.equals(210, f3());
   Expect.equals(9 * 17 + 1, f4());
   Expect.equals(210, f5());
 }