Update tuntap to (the real) 1.3, fix installed locations, etc.

This is what I've been running for a while to support openvpn.
It's been quite stable for me on OI.

Fixes:
a: locations of 64-bit drivers should be:
       /usr/kernel/drv/amd64/*
 not /usr/kernel/amd64/drv/*

b: Don't spew message to the console when loaded

c: Build correctly with PWD != SRCDIR
   (so that "cloney" is not needed)

d: fix the install rule, and use it.

(Yes, should propose those patches to kaizawa)