Comment 13 for bug 1929255

aha, my xx-update-initrd-links lost executable bit again. need to fix that up in my packaging.
But also invalidates my previous test a bit.

# installkernel 5.13.0-051300rc3daily20210526-generic ./linux/boot/vmlinuz-5.13.0-051300rc3daily20210526-generic ./linux/boot/System.map-5.13.0-051300rc3daily20210526-generic
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 5.13.0-051300rc3daily20210526-generic /boot/vmlinuz-5.13.0-051300rc3daily20210526-generic
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 5.13.0-051300rc3daily20210526-generic /boot/vmlinuz-5.13.0-051300rc3daily20210526-generic
update-initramfs: Generating /boot/initrd.img-5.13.0-051300rc3daily20210526-generic
run-parts: executing /etc/kernel/postinst.d/xx-update-initrd-links 5.13.0-051300rc3daily20210526-generic /boot/vmlinuz-5.13.0-051300rc3daily20210526-generic
I: /vmlinuz.old is now a symlink to boot/vmlinuz-5.11.0-16-lowlatency
I: /initrd.img.old is now a symlink to boot/initrd.img-5.11.0-16-lowlatency
I: /vmlinuz is now a symlink to boot/vmlinuz-5.13.0-051300rc3daily20210526-generic
I: /initrd.img is now a symlink to boot/initrd.img-5.13.0-051300rc3daily20210526-generic

all is good.