Implement LWG issue 2061

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@189345 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/iterator b/include/iterator
index 52bc0de..979a964 100644
--- a/include/iterator
+++ b/include/iterator
@@ -1016,7 +1016,7 @@
 template <class _Iter>
 inline _LIBCPP_INLINE_VISIBILITY
 move_iterator<_Iter>
-make_move_iterator(const _Iter& __i)
+make_move_iterator(_Iter __i)
 {
     return move_iterator<_Iter>(__i);
 }