arp(8): fixed typo (priveledge -> privilege)

Ubuntu bug #992204

man/en_US/arp.8

@@ -79,7 +79,7 @@ address type, interface name or host address.
 
 .B arp -d
 .I address
-will delete a ARP table entry. Root or netadmin priveledge is required to do
+will delete a ARP table entry. Root or netadmin privilege is required to do
 this. The entry is found by IP address. If a hostname is given, it will be
 resolved before looking up the entry in the ARP table.