mkosi: add login to packages list on debian/ubuntu

No longer pulled in by default

Author: bluca

mkosi.images/system/mkosi.conf.d/10-debian-ubuntu.conf

@@ -16,6 +16,7 @@ Packages=
         iproute2
         isc-dhcp-server
         libcap-ng-utils
+        login
         netcat-openbsd
         openssh-server
         passwd