[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/experimental/dynarray b/include/experimental/dynarray
index 8ef4571..d94b29b 100644
--- a/include/experimental/dynarray
+++ b/include/experimental/dynarray
@@ -113,7 +113,7 @@
 namespace std { namespace experimental { inline namespace __array_extensions_v1 {
 
 template <class _Tp>
-struct _LIBCPP_TYPE_VIS_ONLY dynarray
+struct _LIBCPP_TEMPLATE_VIS dynarray
 {
 public:
     // types:
@@ -295,7 +295,7 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 template <class _Tp, class _Alloc>
-struct _LIBCPP_TYPE_VIS_ONLY uses_allocator<std::experimental::dynarray<_Tp>, _Alloc> : true_type {};
+struct _LIBCPP_TEMPLATE_VIS uses_allocator<std::experimental::dynarray<_Tp>, _Alloc> : true_type {};
 _LIBCPP_END_NAMESPACE_STD
 
 #endif  // if _LIBCPP_STD_VER > 11