Several issues were encountered and fixed as explained bellow:

* missing link to dbug lib;
* user proper fprintf format specifier;
* ZERO_COND_INITIALIZER was using wrong toku_cond_t struct
  initializer for first member of type pthread_cond_t and
  not considering the TOKU_PTHREAD_DEBUG case which has
  one extra struct member of type pfs_key_t;
* Remove likely(!opt_debug_sync_timeout), argument is
  declared extern and not available to Toku;
* pthread_mutex_timedlock() is not available in pthreads
  for Mac, as it's not part of the POSIX pthreads spec.
  The encompassing event_t::wait(ms) methods are unused,
  thus have been removed;