Comment 0 for bug 1929255

## Problem description

Executing the `/etc/kernel/postinst.d/xx-update-initrd-links` script incorrectly detects symbolic links targets and then creates malformed (hence broken) ones instead:

/initrd.img -> initrd.imgboot/vmlinuz-5.3.0-53-generic
/initrd.img.old -> initrd.imgboot/vmlinuz-5.3.0-53-generic

while it should actually be:

/initrd.img -> boot/initrd.img-5.3.0-53-generic
/initrd.img.old -> boot/initrd.img-5.3.0-53-generic

The problem appeared with the release of the version 4.5ubuntu1.5 of the linux-base package, which made this script executable.

## Solution

A solution is proposed through the attached patch file.

## System information

Description: Ubuntu 18.04.5 LTS
Release: 18.04
Uname: Linux 5.3.0-53-generic x86_64

## Package information

Package: linux-base 4.5ubuntu1.5
PackageArchitecture: all
SourcePackage: linux-base
Tags: bionic package-from-proposed