Fix a standards-conformance problem where we default-initialize a const object of non-POD class type without a user-declared default constructor

[SVN r61672]

libs/system

@@ -1 +1 @@
-Subproject commit 2fe5d75e374912bd80635a4cc7beaee4f187f20c
+Subproject commit ae67c86d2b69b1284c3f0e2b0a4b829a190790c8