lock: Get rid of logging dep

We gonna share this file between subprojects
so lets minimize deps on headers, only syscalls
are left here for non libc compiling.

travis-ci: success for Common headers
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>