Fix the boot issue for openSUSE 16.0 (#3379)

Author: ventoy

INSTALL/grub/grub.cfg

@@ -1439,6 +1439,8 @@ function ventoy_iso_busybox_ver {
             set ventoy_busybox_ver=64
         elif vt_str_begin "$vt_volume_id" "KAOS_"; then
             set ventoy_busybox_ver=64
+        elif vt_str_str "$vt_volume_id" "x86_64"; then
+            set ventoy_busybox_ver=64
 
         fi
     fi