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

sdk/lib/_internal/pub_generated/test/dart2js/minify_configuration_overrides_mode_test.dart

Index: sdk/lib/_internal/pub_generated/test/dart2js/minify_configuration_overrides_mode_test.dart
diff --git a/sdk/lib/_internal/pub/test/dart2js/minify_configuration_overrides_mode_test.dart b/sdk/lib/_internal/pub_generated/test/dart2js/minify_configuration_overrides_mode_test.dart
similarity index 50%
copy from sdk/lib/_internal/pub/test/dart2js/minify_configuration_overrides_mode_test.dart
copy to sdk/lib/_internal/pub_generated/test/dart2js/minify_configuration_overrides_mode_test.dart
index 739bd9d0fd9fd0c392b26be2cc1eef631330bb92..4842d536f23ec28f8ccedf5a6a44452fce98cb6a 100644
--- a/sdk/lib/_internal/pub/test/dart2js/minify_configuration_overrides_mode_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/dart2js/minify_configuration_overrides_mode_test.dart
@@ -1,23 +1,17 @@
-// 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.
-
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 import '../serve/utils.dart';
-
 main() {
   initConfig();
   integration("minify configuration overrides the mode", () {
-    d.dir(appPath, [
-      d.pubspec({
+    d.dir(appPath, [d.pubspec({
         "name": "myapp",
         "transformers": [{
-          "\$dart2js": {"minify": true}
-        }]
-      })
-    ]).create();
-
+            "\$dart2js": {
+              "minify": true
+            }
+          }]
+      })]).create();
     pubServe();
     requestShouldSucceed("main.dart.js", isMinifiedDart2JSOutput);
     endPubServe();