Store the async-await compiled pub code directly in the repo.

sdk/lib/_internal/pub_generated/test/transformer/fails_to_load_a_non_existent_transform_test.dart

Index: sdk/lib/_internal/pub_generated/test/transformer/fails_to_load_a_non_existent_transform_test.dart
diff --git a/sdk/lib/_internal/pub/test/transformer/fails_to_load_a_non_existent_transform_test.dart b/sdk/lib/_internal/pub_generated/test/transformer/fails_to_load_a_non_existent_transform_test.dart
similarity index 61%
copy from sdk/lib/_internal/pub/test/transformer/fails_to_load_a_non_existent_transform_test.dart
copy to sdk/lib/_internal/pub_generated/test/transformer/fails_to_load_a_non_existent_transform_test.dart
index 57456c6063680ef5c2e9fd5873e87c98d7247512..71ef93536bd3d063aedc70b044f16c7c724dab53 100644
--- a/sdk/lib/_internal/pub/test/transformer/fails_to_load_a_non_existent_transform_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/transformer/fails_to_load_a_non_existent_transform_test.dart
@@ -1,24 +1,15 @@
-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS d.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.
-
 library pub_tests;
-
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 import '../serve/utils.dart';
-
 main() {
   initConfig();
   withBarbackVersions("any", () {
     integration("fails to load a non-existent transform", () {
-      d.dir(appPath, [
-        d.pubspec({
+      d.dir(appPath, [d.pubspec({
           "name": "myapp",
           "transformers": ["myapp/transform"]
-        })
-      ]).create();
-
+        })]).create();
       var pub = startPubServe();
       pub.stderr.expect(
           'Transformer library "package:myapp/transform.dart" not found.');