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

sdk/lib/_internal/pub_generated/test/run/app_can_read_from_stdin_test.dart

Index: sdk/lib/_internal/pub_generated/test/run/app_can_read_from_stdin_test.dart
diff --git a/sdk/lib/_internal/pub/test/run/app_can_read_from_stdin_test.dart b/sdk/lib/_internal/pub_generated/test/run/app_can_read_from_stdin_test.dart
similarity index 63%
copy from sdk/lib/_internal/pub/test/run/app_can_read_from_stdin_test.dart
copy to sdk/lib/_internal/pub_generated/test/run/app_can_read_from_stdin_test.dart
index 3a316047dddf990b7971e9be8130817f208096f9..e61a51d040f2a55926fe551cb2784540b35cb694 100644
--- a/sdk/lib/_internal/pub/test/run/app_can_read_from_stdin_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/run/app_can_read_from_stdin_test.dart
@@ -1,10 +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.
-
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
-
 const SCRIPT = """
 import 'dart:io';
 
@@ -17,19 +12,13 @@ main() {
   print(line2);
 }
 """;
-
 main() {
   initConfig();
   integration('the spawned application can read from stdin', () {
-    d.dir(appPath, [
-      d.appPubspec(),
-      d.dir("bin", [
-        d.file("script.dart", SCRIPT)
-      ])
-    ]).create();
-
+    d.dir(
+        appPath,
+        [d.appPubspec(), d.dir("bin", [d.file("script.dart", SCRIPT)])]).create();
     var pub = pubRun(args: ["script"]);
-
     pub.stdout.expect("started");
     pub.writeLine("first");
     pub.stdout.expect("between");