Use pub list-package-dirs in analyzer command line

pkg/analyzer/test/source/test_all.dart

 // 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 test.source;
 
 import 'package:unittest/unittest.dart';
 
+import 'package_map_provider_test.dart' as package_map_provider_test;
 import 'package_map_resolver_test.dart' as package_map_resolver_test;
 
 
 /// Utility for manually running all tests.
 main() {
   groupSep = ' | ';
   group('source', () {
+    package_map_provider_test.main();
     package_map_resolver_test.main();
   });
 }