u2pnpd: add new package

u²pnpd announces a device as UPnP basic device on the
network so that an user could easily find it. It tries
to detect various system information automatically, however
everything can be overridden by UCI settings.

Signed-off-by: Michael Heimpold <mhei@heimpold.de>

net/u2pnpd/files/u2pnpd.defaults

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+uuid=$(cat /proc/sys/kernel/random/uuid)
+
+uci -q batch <<-EOF >/dev/null
+	set u2pnpd.@u2pnpd[0].uuid=$uuid
+	commit u2pnpd
+EOF
+
+exit 0