Log Message:
xz: updated to 5.6.1

5.6.1 (2024-03-09)

* liblzma: Fixed two bugs relating to GNU indirect function (IFUNC)
  with GCC. The more serious bug caused a program linked with
  liblzma to crash on start up if the flag -fprofile-generate was
  used to build liblzma. The second bug caused liblzma to falsely
  report an invalid write to Valgrind when loading liblzma.

* xz: Changed the messages for thread reduction due to memory
  constraints to only appear under the highest verbosity level.

* Build:

    - Fixed a build issue when the header file <linux/landlock.h>
      was present on the system but the Landlock system calls were
      not defined in <sys/syscall.h>.

    - The CMake build now warns and disables NLS if both gettext
      tools and pre-created .gmo files are missing. Previously,
      this caused the CMake build to fail.

* Minor improvements to man pages.

* Minor improvements to tests.