criu --help: shorten --ghost-limit description

Hopefully without losing any meaning, but now it fits in 80 cols
Signed-off-by: Kir Kolyshkin <kir@openvz.org>
Acked-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

criu/crtools.c

@@ -840,7 +840,7 @@ usage:
 "                        can optionally append @<bridge-name> to OUT for moving\n"
 "                        the outside veth to the named bridge\n"
 "  --link-remap          allow one to link unlinked files back when possible\n"
-"  --ghost-limit size    specify maximum size of deleted file contents to be carried inside an image file\n"
+"  --ghost-limit size    limit max size of deleted file contents inside image\n"
 "  --action-script FILE  add an external action script\n"
 "  -j|--" OPT_SHELL_JOB "        allow one to dump and restore shell jobs\n"
 "  -l|--" OPT_FILE_LOCKS "       handle file locks, for safety, only used for container\n"