Try to fix an order-of-initialisation problem with error_category references.

The symptom, which only occurs in some applications, is a crash due to a
dereference of a null pointer. The exact conditions under which the problem
occurs are not fully understood, so this fix is probably more paranoid than
necessary.


[SVN r41100]

libs/asio

@@ -1 +1 @@
-Subproject commit 45add4d11ed508d58de89b8fdeba2eceb98bfa3f
+Subproject commit 5c14db353b746cc003302fda7c659c262a1b003b

libs/system

@@ -1 +1 @@
-Subproject commit 966931ad200bbeabd89e6d5d0d18dc013dbd3aad
+Subproject commit 4d3adbca3f167e89496dea250d53ce52402aafb6