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

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

Index: sdk/lib/_internal/pub_generated/test/cache/add/no_matching_version_test.dart
diff --git a/sdk/lib/_internal/pub/test/cache/add/no_matching_version_test.dart b/sdk/lib/_internal/pub_generated/test/cache/add/no_matching_version_test.dart
similarity index 55%
copy from sdk/lib/_internal/pub/test/cache/add/no_matching_version_test.dart
copy to sdk/lib/_internal/pub_generated/test/cache/add/no_matching_version_test.dart
index 53fd3c573d3aa036378068d2036f215975825070..090b6ff588f3c4e6e48ba5d531d1c107ffdacc59 100644
--- a/sdk/lib/_internal/pub/test/cache/add/no_matching_version_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/cache/add/no_matching_version_test.dart
@@ -1,11 +1,5 @@
-// 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 '../../test_pub.dart';
-
 main() {
   initConfig();
   integration('fails if no version matches the version constraint', () {
@@ -13,8 +7,8 @@ main() {
       builder.serve("foo", "1.2.2");
       builder.serve("foo", "1.2.3");
     });
-
-    schedulePub(args: ["cache", "add", "foo", "-v", ">2.0.0"],
+    schedulePub(
+        args: ["cache", "add", "foo", "-v", ">2.0.0"],
         error: 'Package foo has no versions that match >2.0.0.',
         exitCode: 1);
   });