#1912: some copy edits on boost.intrusive

#1932: move semantics for shared objects
#1635: Incomplete include guard in boost/intrusive

[SVN r45693]

libs/intrusive

@@ -1 +1 @@
-Subproject commit 377a4f8a0bee52eeac56efee0d72ee9feac3eaf6
+Subproject commit 2b0b70b225822bbfe2484f3089f1d365cdaae138