examples: fix byte-order in nfct-event
examples: fix byte-order in nfct-event

Signed-off-by: Pablo Neira Ayuso <707d14912bb250caf67dfe0ea4035681fbfc4f56@netfilter.org>

chamaken/libmnl,Distrotech/libmnl,remfalc/vyt-libmnl,fqrouter/libmnl,chamaken/libmnl,cyclops8456/libmnl,threatstack/libmnl,cyclops8456/libmnl,cyclops8456/libmnl,greearb/libmnl-ct,vyos/libmnl,fqrouter/libmnl,vyos/libmnl,Distrotech/libmnl,vyatta/libmnl,greearb/libmnl-ct,remfalc/vyt-libmnl,threatstack/libmnl,vyos/libmnl,vyatta/libmnl