Update project authors statements to Dartino

pkg/os/lib/system.dart

-// Copyright (c) 2014, the Fletch project authors. Please see the AUTHORS file
+// Copyright (c) 2014, the Dartino 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.md file.
 
 part of os;
 
 const int SHUT_RD   = 0;
 const int SHUT_WR   = 1;
 const int SHUT_RDWR = 2;
 
 const int SEEK_SET = 0;
@@ skipping 109 matching lines @@
         String second = _bytes[i * 2 + 1].toRadixString(16);
         if (second.length == 1) {
           second = "0$second";
         }
         parts[i] = "$first$second";
       }
       return parts.join(":");
     }
   }
 }