Allow Platform.executable for JIT app snapshots.

tests/standalone/io/process_detached_test.dart

Index: tests/standalone/io/process_detached_test.dart
diff --git a/tests/standalone/io/process_detached_test.dart b/tests/standalone/io/process_detached_test.dart
index 194e756776297a7e3ab89b009f00831ae08c1ff1..b72f26af6328524e9bf99b9261603a162c599841 100644
--- a/tests/standalone/io/process_detached_test.dart
+++ b/tests/standalone/io/process_detached_test.dart
@@ -1,7 +1,9 @@
 // Copyright (c) 2015, 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.
-//
+
+// OtherResources=process_detached_script.dart
+
 // Process test program to test detached processes.
 
 import 'dart:async';