debian: Add support for current stable LiveCD

Author: aguslr

mbusb.d/debian.d/live9-generic.cfg mbusb.d/debian.d/live-generic.cfg

@@ -1,6 +1,8 @@
-for isofile in $isopath/debian-live-9*.iso; do
+for isofile in $isopath/debian-live-*.iso; do
   if [ -e "$isofile" ]; then
     regexp --set=isoname "$isopath/(.*)" "$isofile"
+    # Skip if it's Debian 8
+    if regexp "live-8" "$isofile"; then continue; fi
     submenu "$isoname (grub.cfg) ->" "$isofile" {
       iso_path="$2"
       export iso_path