crtools: Fix help text according to new -W option

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

crtools.c

@@ -399,6 +399,7 @@ usage:
 "     --pidfile FILE     write a pid of a root task, service or page-server\n"
 "                        to this file\n"
 "  -W|--work-dir DIR     directory for logs/pidfiles/stats and for criu process itself\n"
+"                        if not specified, the --images-dir is used\n"
 "\n"
 "* Special resources support:\n"
 "  -x|--" USK_EXT_PARAM "      allow external unix connections\n"
@@ -413,7 +414,7 @@ usage:
 "  -l|--" OPT_FILE_LOCKS "       handle file locks, for safety, only used for container\n"
 "\n"
 "* Logging:\n"
-"  -o|--log-file FILE    log file name (path is relative to --images-dir)\n"
+"  -o|--log-file FILE    log file name\n"
 "     --log-pid          enable per-process logging to separate FILE.pid files\n"
 "  -v[NUM]               set logging level:\n"
 "                          -v0        - messages regardless of log level\n"