relax the c++-standard requirement

Author: itrofimow

libcxx/include/__exception/exception_ptr.h

@@ -96,7 +96,7 @@ class _LIBCPP_EXPORTED_FROM_ABI exception_ptr {
 template <class _Ep>
 _LIBCPP_HIDE_FROM_ABI exception_ptr make_exception_ptr(_Ep __e) _NOEXCEPT {
 #  if _LIBCPP_HAS_EXCEPTIONS
-#    if _LIBCPP_AVAILABILITY_HAS_INIT_PRIMARY_EXCEPTION && __cplusplus >= 201703L
+#    if _LIBCPP_AVAILABILITY_HAS_INIT_PRIMARY_EXCEPTION && __cplusplus >= 201103L
   // Clang treats throwing ObjC types differently, and we have to preserve original throw-ing behavior
   // to not break some ObjC invariants. ObjC types are thrown by a pointer, hence the condition;
   // although it does also trigger for some valid c++ usages, this should be a case rare enough to