LU-12147 utils: statone doesn't place \0

LU-12147 utils: statone doesn't place \0

as strncpy() is not supposed to do, the caller has to
take care of that.

Change-Id: I858a7f0eb6c7cdcb70e8a8e445c96f1187c73c2f
Signed-off-by: Alex Zhuravlev <bzzz@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/34572
Reviewed-by: Patrick Farrell <pfarrell@whamcloud.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Mike Pershin <mpershin@whamcloud.com>
Tested-by: Jenkins
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>