Replace strncpy with snprintf to avoid overwriting the last
NULL character.
Coverity issue: 143252
Fixes: 2deb6b5246d7 ("app/procinfo: add collectd format and host id")
Cc: stable@dpdk.org
Signed-off-by: Radu Nicolau <radu.nicolau@intel.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
f0b9479497