message: fix js windows build
diff: @@ -45,7 +45,7 @@ namespace util {
  // lock-free iff the underlying shared_ptr implementation supports atomic
  // operations. Currently the only implemented operation other than copy/move
  // construction/assignment is exchange().
  -template<typename T, bool = _impl::HasAtomicPtrOps<std::shared_ptr<T>>::value>
  +template<typename T, bool = realm::_impl::HasAtomicPtrOps<std::shared_ptr<T>>::value>
  class AtomicSharedPtr;
  template<typename T>
  