Update utils to new library syntax.

utils/archive/reader.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.
 
-#library("reader");
+library reader;
 
-#import("input_stream.dart");
-#import("options.dart");
-#import("read_request.dart");
-#import("utils.dart");
+import 'input_stream.dart';
+import 'options.dart';
+import 'read_request.dart';
+import 'utils.dart';
 
 /**
  * A class for extracting and decompressing an archive.
  *
  * Each instance of this class represents a specific set of options for
  * extracting an archive. These options can be used to create multiple input
  * streams using the [reader.ArchiveReader.openFilename] and
  * [reader.ArchiveReader.openMemory] methods.
  *
  * Before opening an archive, this needs to be configured. [filter] should be
@@ skipping 269 matching lines @@
   /**
    * Options for individual formats. See [the libarchive documentation][wiki]
    * for a list of available options.
    *
    * [wiki]: https://github.com/libarchive/libarchive/wiki/ManPageArchiveReadSetOptions3
    */
   final ArchiveOptions options;
 
   Format._() : options = new ArchiveOptions();
 }