[NFC] Rename _LIBCPP_TYPE_VIS_ONLY to _LIBCPP_TEMPLATE_VIS

The name _LIBCPP_TYPE_VIS_ONLY is no longer accurate because both
_LIBCPP_TYPE_VIS and _LIBCPP_TYPE_VIS_ONLY expand to
__attribute__((__type_visibility__)) with Clang. The only remaining difference
is that _LIBCPP_TYPE_VIS_ONLY can be applied to templates whereas
_LIBCPP_TYPE_VIS cannot (due to dllimport/dllexport not being allowed on
templates).

This patch renames _LIBCPP_TYPE_VIS_ONLY to _LIBCPP_TEMPLATE_VIS.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291035 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/iterator b/include/iterator
index 797ec53..b8f6570 100644
--- a/include/iterator
+++ b/include/iterator
@@ -431,11 +431,11 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-struct _LIBCPP_TYPE_VIS_ONLY input_iterator_tag {};
-struct _LIBCPP_TYPE_VIS_ONLY output_iterator_tag {};
-struct _LIBCPP_TYPE_VIS_ONLY forward_iterator_tag       : public input_iterator_tag {};
-struct _LIBCPP_TYPE_VIS_ONLY bidirectional_iterator_tag : public forward_iterator_tag {};
-struct _LIBCPP_TYPE_VIS_ONLY random_access_iterator_tag : public bidirectional_iterator_tag {};
+struct _LIBCPP_TEMPLATE_VIS input_iterator_tag {};
+struct _LIBCPP_TEMPLATE_VIS output_iterator_tag {};
+struct _LIBCPP_TEMPLATE_VIS forward_iterator_tag       : public input_iterator_tag {};
+struct _LIBCPP_TEMPLATE_VIS bidirectional_iterator_tag : public forward_iterator_tag {};
+struct _LIBCPP_TEMPLATE_VIS random_access_iterator_tag : public bidirectional_iterator_tag {};
 
 template <class _Tp>
 struct __has_iterator_category
@@ -478,11 +478,11 @@
 //    the client expects instead of failing at compile time.
 
 template <class _Iter>
-struct _LIBCPP_TYPE_VIS_ONLY iterator_traits
+struct _LIBCPP_TEMPLATE_VIS iterator_traits
     : __iterator_traits<_Iter, __has_iterator_category<_Iter>::value> {};
 
 template<class _Tp>
-struct _LIBCPP_TYPE_VIS_ONLY iterator_traits<_Tp*>
+struct _LIBCPP_TEMPLATE_VIS iterator_traits<_Tp*>
 {
     typedef ptrdiff_t difference_type;
     typedef typename remove_const<_Tp>::type value_type;
@@ -519,7 +519,7 @@
 
 template<class _Category, class _Tp, class _Distance = ptrdiff_t,
          class _Pointer = _Tp*, class _Reference = _Tp&>
-struct _LIBCPP_TYPE_VIS_ONLY iterator
+struct _LIBCPP_TEMPLATE_VIS iterator
 {
     typedef _Tp        value_type;
     typedef _Distance  difference_type;
@@ -616,7 +616,7 @@
 }
 
 template <class _Iter>
-class _LIBCPP_TYPE_VIS_ONLY reverse_iterator
+class _LIBCPP_TEMPLATE_VIS reverse_iterator
     : public iterator<typename iterator_traits<_Iter>::iterator_category,
                       typename iterator_traits<_Iter>::value_type,
                       typename iterator_traits<_Iter>::difference_type,
@@ -755,7 +755,7 @@
 #endif
 
 template <class _Container>
-class _LIBCPP_TYPE_VIS_ONLY back_insert_iterator
+class _LIBCPP_TEMPLATE_VIS back_insert_iterator
     : public iterator<output_iterator_tag,
                       void,
                       void,
@@ -788,7 +788,7 @@
 }
 
 template <class _Container>
-class _LIBCPP_TYPE_VIS_ONLY front_insert_iterator
+class _LIBCPP_TEMPLATE_VIS front_insert_iterator
     : public iterator<output_iterator_tag,
                       void,
                       void,
@@ -821,7 +821,7 @@
 }
 
 template <class _Container>
-class _LIBCPP_TYPE_VIS_ONLY insert_iterator
+class _LIBCPP_TEMPLATE_VIS insert_iterator
     : public iterator<output_iterator_tag,
                       void,
                       void,
@@ -857,7 +857,7 @@
 
 template <class _Tp, class _CharT = char,
           class _Traits = char_traits<_CharT>, class _Distance = ptrdiff_t>
-class _LIBCPP_TYPE_VIS_ONLY istream_iterator
+class _LIBCPP_TEMPLATE_VIS istream_iterator
     : public iterator<input_iterator_tag, _Tp, _Distance, const _Tp*, const _Tp&>
 {
 public:
@@ -896,7 +896,7 @@
 };
 
 template <class _Tp, class _CharT = char, class _Traits = char_traits<_CharT> >
-class _LIBCPP_TYPE_VIS_ONLY ostream_iterator
+class _LIBCPP_TEMPLATE_VIS ostream_iterator
     : public iterator<output_iterator_tag, void, void, void, void>
 {
 public:
@@ -925,7 +925,7 @@
 };
 
 template<class _CharT, class _Traits>
-class _LIBCPP_TYPE_VIS_ONLY istreambuf_iterator
+class _LIBCPP_TEMPLATE_VIS istreambuf_iterator
     : public iterator<input_iterator_tag, _CharT,
                       typename _Traits::off_type, _CharT*,
                       _CharT>
@@ -996,7 +996,7 @@
                 {return !__a.equal(__b);}
 
 template <class _CharT, class _Traits>
-class _LIBCPP_TYPE_VIS_ONLY ostreambuf_iterator
+class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator
     : public iterator<output_iterator_tag, void, void, void, void>
 {
 public:
@@ -1037,7 +1037,7 @@
 };
 
 template <class _Iter>
-class _LIBCPP_TYPE_VIS_ONLY move_iterator
+class _LIBCPP_TEMPLATE_VIS move_iterator
 {
 private:
     _Iter __i;
@@ -1383,7 +1383,7 @@
 
     template <class _Up> friend class __wrap_iter;
     template <class _CharT, class _Traits, class _Alloc> friend class basic_string;
-    template <class _Tp, class _Alloc> friend class _LIBCPP_TYPE_VIS_ONLY vector;
+    template <class _Tp, class _Alloc> friend class _LIBCPP_TEMPLATE_VIS vector;
 
     template <class _Iter1, class _Iter2>
     friend