First cut at analysis driver

pkg/analyzer/test/src/test_all.dart

 // Copyright (c) 2015, 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 test.src;
+library test.src.test_all;
 
 import 'package:unittest/unittest.dart';
 
+import 'context/test_all.dart' as context;
 import 'task/test_all.dart' as task;
 import 'util/test_all.dart' as util;
 
 /// Utility for manually running all tests.
 main() {
   groupSep = ' | ';
   group('src tests', () {
+    context.main();
     task.main();
     util.main();
   });
 }