fix: build OCI image failed to build

Fix the bug added by this commit [0]. The bug added
is that the build livefs for a OCI image file failed
see Jenkins logs [1] and buildlog [2]. This commit
permit to fix this issue.

Refs: [0] https://git.launchpad.net/livecd-rootfs/commit/?id=2b5e8a81e57ae89b9ebed9bab20423d2e61d80d0
      [1] https://jenkins.canonical.com/devel-cloud-images/view/OCI/job/22.10-UbuntuOCI-Build-Images/73/ARCH=amd64,NODE=kinetic/console
      [2] https://launchpad.net/~cloud-images-release-managers/+livefs/ubuntu/kinetic/ubuntu-oci/+build/375833

Signed_by: Samir Akarioh and Tomas Virtus

live-build/auto/config

@@ -1036,6 +1036,8 @@ case $PROJECT:${SUBPROJECT:-} in
 		;;
 	ubuntu-base:*|ubuntu-core:*)
 		;;
+	ubuntu-oci:*)
+		;;
 	*)
 		BASE_SEED='desktop'
 		;;