Add the "efi" target to "Makefile".
Introduce "Makefile.edk2" for building and cleaning the firmware images
and varstore templates.
Collect the common bits from the recipes in the helper script
"edk2-build.sh".
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
