add kmod-wireguard to ipk source

Wireguard is precompiled into the kernel

zcat /proc/config.gz | grep WIREGUARD

CONFIG_WIREGUARD=y
# CONFIG_WIREGUARD_DEBUG is not set

This package simply makes opkg understand that its already installed.

ipk-source/kmod-wireguard/CONTROL/control

@@ -0,0 +1,7 @@
+Package: kmod-wireguard
+Depends: sdxpinn-patch
+Version: 1
+Architecture: sdxpinn
+Maintainer: Cameron Thompson iamromulan@github.com
+Source: github.com/iamromulan
+Description: Wireguard is compiled into the kernel

ipk-source/kmod-wireguard/CONTROL/postinst

@@ -0,0 +1,5 @@
+#!/bin/ash
+
+echo "kmod-wireguard registration Complete"
+
+exit 0