Minor changes in the multstrap.conf

Put linux-image-amd64 and xen-linux-system-amd64 in the GRNet section
of multistrap.conf

snf-image-host/multistrap.conf

@@ -21,12 +21,12 @@ debootstrap=Debian GRNet
 aptsources=Debian
 
 [Debian]
-packages=linux-image-amd64 xen-linux-system-amd64 socat iproute xenstore-utils ntfsprogs xmlstarlet python reglookup chntpw parted python-support eatmydata gdisk ntfs-3g
+packages=socat iproute xenstore-utils ntfsprogs xmlstarlet python reglookup chntpw parted python-support eatmydata gdisk ntfs-3g
 source=http://ftp.gr.debian.org/debian
 suite=wheezy
 
 [GRNet]
-packages=snf-image-helper ufsutils
+packages=snf-image-helper ufsutils linux-image-amd64 xen-linux-system-amd64
 # Don't change the parameters below unless you really know what you are doing.
 # The /'s and the empty `componets' variable are needed when working with apt.
 source=http://apt.dev.grnet.gr/