[boost] [serialization] Small patches for serialization of STL containers

Here's a few patches against HEAD to comment out unused 'file_version' parameters in the load()/save() funtions in the serialization of some of the STL containers. (The compiler emits quite a mess if set to warn on unused parameters). It's only a minor annoyance, but would be nice if these could be snuck into 1.34 :) -- Tarjei