Update project authors statements to Dartino

src/pkg/mdns/mdns_extension_macos.cc

-// Copyright (c) 2015, the Fletch project authors. Please see the AUTHORS file
+// Copyright (c) 2015, 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.
 
 #if defined(FLETCH_TARGET_OS_MACOS)
 
 #include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <arpa/inet.h>
@@ skipping 159 matching lines @@
   } else {
     // Start a thread for pumping the results.
     context->ref = ref;
     context->timeout = timeout;
     context->port = port_id;
     StartThread(context);
   }
 }
 
 #endif