Fix getty on serial for xenial
diff --git a/ubuntu-16.04/scripts/security.sh b/ubuntu-16.04/scripts/security.sh
index 5cd8159..32ff37e 100644
--- a/ubuntu-16.04/scripts/security.sh
+++ b/ubuntu-16.04/scripts/security.sh
@@ -5,7 +5,7 @@
 systemctl enable getty-autologin@tty1.service
 
 # Libvirt serial console support
-cat << 'EOF' >> /etc/systemd/system/getty-serial@.service
+cat << 'EOF' >> /etc/systemd/system/serial-getty@.service
 [Unit]
 Description=Getty on %I
 Documentation=man:agetty(8) man:systemd-getty-generator(8)
@@ -40,7 +40,7 @@
 EOF
 
 systemctl daemon-reload
-systemctl enable getty-serial@ttyS0.service
+systemctl enable serial-getty@ttyS0.service
 
 # Disable password root login
 usermod -p '!' root