Install avahi on image

src/freedombone-image-customise

@@ -288,6 +288,7 @@ if [ -n "$CUSTOM_SETUP" ]; then
 fi
 
 chroot "$rootdir" apt-get install -y sudo git dialog build-essential openssh-server
+chroot "$rootdir" apt-get install -y avahi-daemon avahi-utils avahi-discover
 chroot "$rootdir" /bin/bash -x <<EOF
 git clone https://github.com/bashrc/freedombone /root/freedombone
 cd /root/freedombone