This packagegroup includes all of the userspace packages needed to use SELinux.
For now, use the same variant of the packagegroup, which contains all available
packages.
Since the meta-selinux layer isn't available in all platforms, implement this
change via a dynamic layer.
https://onedigi.atlassian.net/browse/DEL-7641
Signed-off-by: Gabriel Valcazar <gabriel.valcazar@digi.com>