Instantiate more bcc32 v5.1 workarounds.

Fix for Chinese Win32 locales.
Don't test c_regex_traits if it's not present.


[SVN r31768]

libs/regex

@@ -1 +1 @@
-Subproject commit 1c2ff0ab50a9c5dc5409e97d70cc7dca3ce8b181
+Subproject commit 9d76e955757d1e1ba41431293c7efc62a695ff39