Really make the tool directory singular in intl

pkg/intl/tool/generate_locale_data_files.dart

 // Copyright (c) 2012, 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.
 
 /**
  * A utility program to take locale data represented as a Dart map whose keys
  * are locale names and write it into individual JSON files named by locale.
  * This should be run any time the locale data changes.
  *
  * The files are written under "data/dates", in two subdirectories, "symbols"
  * and "patterns". In "data/dates" it will also generate "localeList.dart",
  * which is sourced by the date_symbol_data... files.
  */
 
-#import('../date_symbols.dart');
-#import('../date_symbol_data_local.dart');
-#import('../date_time_patterns.dart');
-#import('../date_format.dart');
+#import('../lib/date_symbols.dart');
+#import('../lib/date_symbol_data_local.dart');
+#import('../lib/date_time_patterns.dart');
+#import('../lib/date_format.dart');
 #import('dart:io');
 #import('dart:json');
 #import('../test/data_directory.dart');
 
 main() {
   initializeDateFormatting("en_IGNORED", null);
   writeSymbolData();
   writePatternData();
   // TODO(alanknight): Are the en_ISO patterns reliably the same as general en?
   writePatterns("en_ISO", dateTimePatternMap()["en"]);
@@ skipping 41 matching lines @@
 void writePatterns(locale, patterns) {
   var file = new File('${dataDirectory}patterns/${locale}.json');
   var outputStream = file.openOutputStream();
   outputStream.writeString(JSON.stringify(patterns));
   outputStream.close();
 }
 
 void writeToJSON(Dynamic data, OutputStream out) {
   out.writeString(JSON.stringify(data.serializeToMap()));
 }