Update project authors statements to Dartino

src/vm/gc_thread.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.
 
 #include "src/shared/bytecodes.h"
 #include "src/vm/gc_thread.h"
 #include "src/vm/program.h"
 #include "src/vm/process.h"
 #include "src/vm/scheduler.h"
 
 namespace fletch {
@@ skipping 203 matching lines @@
 
   // Tell caller of GCThread.Shutdown() we're done.
   {
     ScopedMonitorLock lock(client_monitor_);
     did_shutdown_ = true;
     client_monitor_->NotifyAll();
   }
 }
 
 }  // namespace fletch