Log Message:
(pkgsrc)
 - Drop patch-Colo_ecb.h
   (It was "Use __builtin_unreachable on Clang instead of the broken C11 \ 
hack.",
   and now upstream takes care.)

(upstream)
 - Update 6.41 to 6.42
-------------------
6.42 Wed Feb 11 20:29:52 CET 2015
     - Coro::SemaphoreSet->try did not actually work (analyzed by
       SATO Kentaro).
     - upgrade libecb to be C11 compliant.