Update project authors statements to Dartino

src/vm/spinlock.h

-// 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.
 
 #ifndef SRC_VM_SPINLOCK_H_
 #define SRC_VM_SPINLOCK_H_
 
 #include "src/shared/atomic.h"
 
 namespace fletch {
 
@@ skipping 21 matching lines @@
   explicit ScopedSpinlock(Spinlock* lock) : lock_(lock) { lock_->Lock(); }
   ~ScopedSpinlock() { lock_->Unlock(); }
 
  private:
   Spinlock* lock_;
 };
 
 }  // namespace fletch
 
 #endif  // SRC_VM_SPINLOCK_H_