Make make_exception_ptr abort with -fno-exceptions

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@288575 91177308-0d34-0410-b5e6-96231b3b80d8

include/exception

@@ -79,6 +79,7 @@ template <class E> void rethrow_if_nested(const E& e);
 
 #include <__config>
 #include <cstddef>
+#include <cstdlib>
 #include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -161,7 +162,9 @@ make_exception_ptr(_Ep __e) _NOEXCEPT
     {
         return current_exception();
     }
-#endif  // _LIBCPP_NO_EXCEPTIONS
+#else
+    _VSTD::abort();
+#endif
 }
 
 // nested_exception