assemble_image.sh: use grub 2.02 from old image instead of broken grub 2.04

assemble_image.sh

@@ -4,8 +4,9 @@ set -e
 set -x
 
 image_size="7G"
-kubuntu="kubuntu-eoan-desktop-amd64.daily_2019-09-17.iso"
-xubuntu="xubuntu-eoan-desktop-amd64.daily_2019-09-17.iso"
+kubuntu="kubuntu-19.10-beta-desktop-amd64.iso"
+xubuntu="xubuntu-19.10-beta-desktop-amd64.iso"
+old_buntu="xubuntu-18.04.3-desktop-amd64.iso"
 workspace="/workspace"
 
 # mtools, ddrescure, fdisk, grub, 7z
@@ -18,8 +19,8 @@ rsync -av /usr/share/grub/themes "$workspace/part_files"/grub
 mkdir -p "$workspace/part_files"/grub/fonts/
 rsync -av /usr/share/grub/unicode.pf2 "$workspace/part_files"/grub/fonts/
 
-7z x "$kubuntu" -o"$workspace/part_files" EFI/
-7z x "$kubuntu" -o"$workspace/part_files" boot/grub/x86_64-efi
+7z x "$old_buntu" -o"$workspace/part_files" EFI/
+7z x "$old_buntu" -o"$workspace/part_files" boot/grub/x86_64-efi
 
 mv "$workspace/part_files"/grub/* "$workspace/part_files"/boot/grub/
 rm -rf "$workspace/part_files"/grub