compel/log: increase a max line length

There are a lot of lines, which are longer than 79:

(04.331172)pie: 1: Error (criu/pie/restorer.c:460): seccomp: Unexpected tid ->
(04.331172)pie: 1: 1 != 1
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
Acked-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>

compel/plugins/include/uapi/std/log.h

 #ifndef COMPEL_PLUGIN_STD_LOG_H__
 #define COMPEL_PLUGIN_STD_LOG_H__
 
-#define STD_LOG_SIMPLE_CHUNK	79
+#define STD_LOG_SIMPLE_CHUNK	256
 
 extern void std_log_set_fd(int fd);
 extern void std_log_set_loglevel(unsigned int level);