Support automated keyboard configuration on systems with setupcon

usr/share/rear/conf/GNU/Linux.conf

@@ -166,7 +166,9 @@ sysctl
 blockdev
 lsblk
 clear
+ckbcomp # required for keyboard layout if setupcon is used
 
+)
 # Older releases of os-prober (1.74 and below) use dmsetup as a fallback
 # solution for mounting when grub-mount is missing.
 #