Add (an as yet unused) task

pkg/analyzer/test/task/test_all.dart

Index: pkg/analyzer/test/task/test_all.dart
diff --git a/pkg/smoke/test/mirrors_test.dart b/pkg/analyzer/test/task/test_all.dart
similarity index 57%
copy from pkg/smoke/test/mirrors_test.dart
copy to pkg/analyzer/test/task/test_all.dart
index cac643aab81c93a6e746f0e98bda711882f6c7f6..9ecd16215ffb783037abdb763a392bfa04311251 100644
--- a/pkg/smoke/test/mirrors_test.dart
+++ b/pkg/analyzer/test/task/test_all.dart
@@ -2,13 +2,16 @@
 // 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 smoke.test.mirrors_test;
+library test.task;
 
-import 'package:smoke/mirrors.dart';
 import 'package:unittest/unittest.dart';
-import 'common.dart' as common show main;
 
+import 'task_dart_test.dart' as task_dart_test;
+
+/// Utility for manually running all tests.
 main() {
-  setUp(useMirrors);
-  common.main();
+  groupSep = ' | ';
+  group('generated tests', () {
+    task_dart_test.main();
+  });
 }