app/procinfo: use strlcpy for copying string

app/procinfo: use strlcpy for copying string

Replaced strncpy and strcpy with strlcpy.
Also replaced snprintf with strlcpy where applicable.
Using strlcpy is safe practice when copying strings, as it will include
a null terminator.

Fixes: 2deb6b5246d7 ("app/procinfo: add collectd format and host id")
Fixes: 8a37f37fc243 ("app/procinfo: add --show-port")
Cc: stable@dpdk.org
Reported-by: Reshma Pattan <reshma.pattan@intel.com>
Signed-off-by: Ciara Power <ciara.power@intel.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>