Add nomacboot option for spin-livemedia

Fixes: https://pagure.io/koji/issue/2259

cli/koji_cli/commands.py

@@ -5701,6 +5701,8 @@ def handle_spin_livemedia(options, session, args):
                       help=_('The URL to the SCM containing any custom lorax '
                              'templates that are to be used to override the '
                              'default templates.'))
+    parser.add_option('--nomacboot', action="store_true",
+                      help=_("Pass the nomacboot option to livemedia-creator"))
     (task_options, args) = parser.parse_args(args)
 
     # Make sure the target and kickstart is specified.
@@ -6083,7 +6085,7 @@ def _build_image(options, task_opts, session, args, img_type):
         'format', 'install_tree_url', 'isoname', 'ksurl',
         'ksversion', 'release', 'repo', 'scratch', 'skip_tag',
         'specfile', 'vcpu', 'vmem', 'volid', 'optional_arches',
-        'lorax_dir', 'lorax_url',
+        'lorax_dir', 'lorax_url', 'nomacboot',
     ]
     for opt in passthru_opts:
         val = getattr(task_opts, opt, None)