Link boost_serialization into boost_wserialization, since the latter depends

on the former, and on Windows, DLL with unresolved symbols can't be linked
at all.


[SVN r32912]

libs/serialization

@@ -1 +1 @@
-Subproject commit 580ef7b49646e71bc1bd897e67cba41e970872d3
+Subproject commit 91f7a57b7bbf769d330be69f2ce1ed0440513957