Fix library syntax

runtime/lib/crypto/crypto_vm.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.
 
 // TODO(ager, iposva): Get rid of this file when the VM snapshot
 // generation can deal with normal library structure.
 
-#library('crypto');
+library crypto;
 
-#import('dart:math');
+import 'dart:math';
 
 /**
  * Interface for cryptographic hash functions.
  *
  * The [update] method is used to add data to the hash. The [digest] method
  * is used to extract the message digest.
  *
  * Once the [digest] method has been called no more data can be added using the
  * [update] method. If [update] is called after the first call to [digest] a
  * HashException is thrown.
@@ skipping 97 matching lines @@
 /**
  * HashExceptions are thrown on invalid use of a Hash
  * object.
  */
 class HashException {
   HashException(String this.message);
   toString() => "HashException: $message";
   String message;
 }