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

sdk/lib/_internal/pub_generated/test/cache/add/package_not_found_test.dart

Index: sdk/lib/_internal/pub_generated/test/cache/add/package_not_found_test.dart
diff --git a/sdk/lib/_internal/pub/test/cache/add/package_not_found_test.dart b/sdk/lib/_internal/pub_generated/test/cache/add/package_not_found_test.dart
similarity index 56%
copy from sdk/lib/_internal/pub/test/cache/add/package_not_found_test.dart
copy to sdk/lib/_internal/pub_generated/test/cache/add/package_not_found_test.dart
index 1ee9daff5dea279d11cc4f7297f78095bf32e476..b40dd63bed0081313c5694d97cf6b1cec47d773a 100644
--- a/sdk/lib/_internal/pub/test/cache/add/package_not_found_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/cache/add/package_not_found_test.dart
@@ -1,18 +1,12 @@
-// Copyright (c) 2014, 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.
-
 library pub_tests;
-
 import '../../../lib/src/exit_codes.dart' as exit_codes;
 import '../../test_pub.dart';
-
 main() {
   initConfig();
   integration('fails if the package cound not be found on the source', () {
     serveNoPackages();
-
-    schedulePub(args: ["cache", "add", "foo"],
+    schedulePub(
+        args: ["cache", "add", "foo"],
         error: new RegExp(r"Could not find package foo at http://.*"),
         exitCode: exit_codes.UNAVAILABLE);
   });