disable systemd-timesyncd

fixes https://github.com/QubesOS/qubes-issues/issues/1754

vm-systemd/75-qubes-vm.preset

@@ -30,6 +30,7 @@ disable plymouth-quit-wait.service
 disable smartd.service
 disable upower.service
 disable colord.service
+disable systemd-timesyncd
 
 # Fedora only services
 disable backuppc.service