Add a hint to rename .analysis_options files.

pkg/analyzer/lib/error/error.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 analyzer.error.error;
 
 import 'dart:collection';
 
 import 'package:analyzer/error/listener.dart';
 import 'package:analyzer/src/dart/scanner/scanner.dart' show ScannerErrorCode;
@@ skipping 31 matching lines @@
   // need to be filled in by hand.
   //
   AnalysisOptionsErrorCode.PARSE_ERROR,
   AnalysisOptionsErrorCode.INCLUDED_FILE_PARSE_ERROR,
   AnalysisOptionsWarningCode.INCLUDE_FILE_NOT_FOUND,
   AnalysisOptionsWarningCode.INCLUDED_FILE_WARNING,
   AnalysisOptionsWarningCode.UNRECOGNIZED_ERROR_CODE,
   AnalysisOptionsWarningCode.UNSUPPORTED_OPTION_WITH_LEGAL_VALUE,
   AnalysisOptionsWarningCode.UNSUPPORTED_OPTION_WITH_LEGAL_VALUES,
   AnalysisOptionsWarningCode.UNSUPPORTED_VALUE,
+  AnalysisOptionsHintCode.DEPRECATED_ANALYSIS_OPTIONS_FILE_NAME,
   CheckedModeCompileTimeErrorCode.CONST_CONSTRUCTOR_FIELD_TYPE_MISMATCH,
   CheckedModeCompileTimeErrorCode.CONST_CONSTRUCTOR_PARAM_TYPE_MISMATCH,
   CheckedModeCompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION,
   CheckedModeCompileTimeErrorCode.CONST_FIELD_INITIALIZER_NOT_ASSIGNABLE,
   CheckedModeCompileTimeErrorCode.LIST_ELEMENT_TYPE_NOT_ASSIGNABLE,
   CheckedModeCompileTimeErrorCode.MAP_KEY_TYPE_NOT_ASSIGNABLE,
   CheckedModeCompileTimeErrorCode.MAP_VALUE_TYPE_NOT_ASSIGNABLE,
   CheckedModeCompileTimeErrorCode.VARIABLE_TYPE_MISMATCH,
   CompileTimeErrorCode.ACCESS_PRIVATE_ENUM_FIELD,
   CompileTimeErrorCode.AMBIGUOUS_EXPORT,
@@ skipping 785 matching lines @@
    * a single list of errors.
    */
   static List<AnalysisError> mergeLists(List<List<AnalysisError>> errorLists) {
     Set<AnalysisError> errors = new HashSet<AnalysisError>();
     for (List<AnalysisError> errorList in errorLists) {
       errors.addAll(errorList);
     }
     return errors.toList();
   }
 }