Initial import

new repository splitting out the EDK2 (Efi Development Kit II) backed
OVMF (Open Virtual Machine Firmware) from pve-qemu package, where
only pre-built BLOBs were tracked.

Borrow some the built style from the Debian Upstream package.

We do not provide/conflict ovmf from Debian, but rather see this as
it's own package, providing the FW files under its own path.

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>