Add arcconf package (1.5.20942)

Addressing http://hwraid.le-vert.net/ticket/262

This is my *first contact* with `dpkg-buildpackage` et al.

I understand that *adaptec-storage-manager-linux-64bit* already contains an *arcconf* package. But it seems the "StorMan" is not maintained by Adaptec anymore.

I don't fully understand how you're building packages within this repo.
I managed to create a new arcconf package with:
```sh
apt-get install -y build-essential quilt debhelper libstdc++5
cd packaging/debian/arcconf-linux-64bit
ln -s . debian
dpkg-buildpackage
```

@eLvErDe what do you think?