Add a version number for full and script snapshots.

tests/standalone/issue14236_source.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.
-//
-// This is the original dart program that was used to generate the snapshot
-// in file issue14236_test.dart
-// The original test/main has been commented out and we have a test/main which
-// throws an error to ensure that this file is not executed as part of the
-// test.
-//
-// When issue14236_test.dart fails, you must regenerate it using the VM
-// with your changes. You should understand what in your change makes
-// regeneration of the snapshot necessary.
-// Steps for regenerating:
-// 1) Swap the test functions below.
-// 2) $ ./xcodebuild/DebugIA32/dart --package-root=./xcodebuild/DebugIA32/packages --snapshot=tests/standalone/issue14236_test.dart tests/standalone/issue14236_source.dart
-// OR:
-// 2) $ ./out/DebugIA32/dart --package-root=./out/DebugIA32/packages --snapshot=tests/standalone/issue14236_test.dart tests/standalone/issue14236_source.dart
-// 3) Undo changes in 1.
-
-library test.issue14236;
-import "dart:isolate";
-import "package:expect/expect.dart";
-import "package:async_helper/async_helper.dart";
-
-
-/*
-test(SendPort replyTo) {
-  replyTo.send("from Isolate");
-}
-*/
-
-test(dummy) {
-  Expect.fail("Don't expect this to run at all");
-}
-
-main() {
-  asyncStart();
-  ReceivePort port = new ReceivePort();
-  Isolate.spawn(test, port.sendPort);
-  port.first.then((msg) {
-    Expect.equals("from Isolate", msg);
-    asyncEnd();
-  });
-}