Test pkcs11 URI support for UEFI capsule generation. Both public certificate and private key are used over pkcs11 protocol. Pkcs11-tool has been introduced as softhsm tool doesn't have functionality to import certificates in commonly distributed version (only in the latest). Signed-off-by: Wojciech Dubowik <Wojciech.Dubowik@mt.com> Reviewed-by: Simon Glass <simon.glass@canonical.com>