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

tests/standalone/pair_location_remapping_test.dart

Index: tests/standalone/pair_location_remapping_test.dart
diff --git a/tests/standalone/pair_location_remapping_test.dart b/tests/standalone/pair_location_remapping_test.dart
index 277ccc53cbfb463c61bcb647593b22e3f109c863..98abdf18646d8508bfbabf2f8495167b894bd367 100644
--- a/tests/standalone/pair_location_remapping_test.dart
+++ b/tests/standalone/pair_location_remapping_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 that pair locations are remaped in slow path environments.
-// VMOptions=--optimization_counter_threshold=10 --no-use-osr
+// VMOptions=--optimization_counter_threshold=10 --no-use-osr --no-background_compilation
 
 import "package:expect/expect.dart";