Rename fletch -> dartino

src/vm/spinlock.h

 // 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 {
+namespace dartino {
 
 // Please limit the use of spinlocks (e.g. reduce critical region to absolute
 // minimum, only if a normal mutex is a bottleneck).
 class Spinlock {
  public:
   Spinlock() : is_locked_(false) {}
 
   bool IsLocked() const { return is_locked_; }
 
   void Lock() {
     while (is_locked_.exchange(true, kAcquire)) {
     }
   }
 
   void Unlock() { is_locked_.store(false, kRelease); }
 
  private:
   Atomic<bool> is_locked_;
 };
 
 class ScopedSpinlock {
  public:
   explicit ScopedSpinlock(Spinlock* lock) : lock_(lock) { lock_->Lock(); }
   ~ScopedSpinlock() { lock_->Unlock(); }
 
  private:
   Spinlock* lock_;
 };
 
-}  // namespace fletch
+}  // namespace dartino
 
 #endif  // SRC_VM_SPINLOCK_H_