visibility-decoration.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@114545 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/initializer_list b/include/initializer_list
index 671aa27..16ffccc 100644
--- a/include/initializer_list
+++ b/include/initializer_list
@@ -52,7 +52,7 @@
 {
 
 template<class _E>
-class initializer_list
+class _LIBCPP_VISIBLE initializer_list
 {
     const _E* __begin_;
     size_t    __size_;