[build] boost,dep,fix: boost >= 1.0.50 build fix

 - reported by ramccor  ; boost >= 1.0.50 now uses TIME_UTC_ instead of

   TIME_UTC
 - for reference: The change TIME_UTC_ was motivated by https://svn.boost.org/trac/boost/ticket/6940 TIME_UTC is a macro in C11.

 - closes issue #29