Allow Platform.executable for JIT app snapshots.

tests/standalone/io/file_blocking_lock_test.dart

 // Copyright (c) 2016, 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=file_blocking_lock_script.dart
+
 // This test works by spawning a new process running
 // file_blocking_lock_script.dart, trading the file lock back and forth,
 // writing bytes 1 ... 25 in order to the file. There are checks to ensure
 // that the bytes are written in order, that one process doesn't write all the
 // bytes and that a non-blocking lock fails such that a blocking lock must
 // be taken, which succeeds.
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
@@ skipping 85 matching lines @@
     await raf.close();
     await directory.delete(recursive: true);
   });
 }
 
 main() async {
   asyncStart();
   await testLockWholeFile();
   asyncEnd();
 }