[Docs] Add instructions for Arch Linux
[Docs] Add instructions for Arch Linux

vagrant-libvirt/vagrant-libvirt,pradels/vagrant-libvirt,electrofelix/vagrant-libvirt,electrofelix/vagrant-libvirt,infernix/vagrant-libvirt,electrofelix/vagrant-libvirt,infernix/vagrant-libvirt,pradels/vagrant-libvirt,vagrant-libvirt/vagrant-libvirt,infernix/vagrant-libvirt,vagrant-libvirt/vagrant-libvirt