iptables-translate: add in/out ifname wildcard match translation to nft

iptables-translate: add in/out ifname wildcard match translation to nft

In iptables, "-i eth+" means match all in ifname with the prefix "eth".
But in nftables, this was changed to "iifname eth*". So we should handle
this subtle difference.

Apply this patch, translation will become:
  # iptables-translate -A INPUT -i eth+
  nft add rule ip filter INPUT iifname eth* counter
  # ip6tables-translate -A OUTPUT ! -o eth+
  nft add rule ip6 filter OUTPUT oifname != eth* counter

Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>