Merge pull request github#939 from github/jeongsoolee09/fix-array-iterator-stub

Change occurrence of `std::iterator<...>` to `__iterator` in the C++ stub library `array`

Author: jeongsoolee09

cpp/common/test/includes/standard-library/array

@@ -8,8 +8,8 @@ namespace std {
 template <class T, size_t N> struct array {
   typedef T &reference;
   typedef const T &const_reference;
-  typedef std::iterator<random_access_iterator_tag, T> iterator;
-  typedef std::iterator<random_access_iterator_tag, T> const_iterator;
+  typedef __iterator<T> iterator;
+  typedef __iterator<const T> const_iterator;
   typedef size_t size_type;
 
   typedef ptrdiff_t difference_type;