[boost] [1.55] Request for permission to merge fix for chrono.

Hi, I would like to merge if possible this fix https://svn.boost.org/trac/boost/changeset/86547 for this bug https://svn.boost.org/trac/boost/ticket/9337 . The bug was introduced on [75920] https://svn.boost.org/trac/boost/changeset/75920, so long time ago :( Please let me know. Vicente