fix path in generated comment

pkg/analysis_server/test/integration/integration_test_methods.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.
 //
 // This file has been automatically generated.  Please do not edit it manually.
 // To regenerate the file, use the script
-// "pkg/analysis_server/spec/generate_files".
+// "pkg/analysis_server/tool/spec/generate_files".
 
 /**
  * Convenience methods for running integration tests
  */
 library test.integration.methods;
 
 import 'dart:async';
 
 import 'package:unittest/unittest.dart';
 
@@ skipping 1439 matching lines @@
       case "execution.launchData":
         expect(params, isExecutionLaunchDataParams);
         _onExecutionLaunchData.add(params);
         break;
       default:
         fail('Unexpected notification: $event');
         break;
     }
   }
 }