xz-clib-5.8.1: Changelog.md

## 5.8.1

* Update to 5.8.1 upstream sources, fixing [CVE-2025-31115](https://tukaani.org/xz/#_cve_2025_31115_threaded_xz_decoder_frees_memory_too_early)

## 5.8.0.1

* Fix linking issues due to including `tuklib_mbstr_nonprint.c` and `tuklib_mbstr_wrap.c`

## 5.8.0

* Update to 5.8.0 upstream sources

## 5.6.3

* Update to 5.6.3 upstream sources

## 5.2.5

* Fork cbits from `lzma-static`