[freebsd] Remove the use of basename from log_msg.
[freebsd] Remove the use of basename from log_msg.

Fix

sureshsundriyal/lnav,tstack/lnav,sureshsundriyal/lnav,tstack/lnav,tstack/lnav,tstack/lnav,sureshsundriyal/lnav,sureshsundriyal/lnav