Log Message:
lutok: update to 0.6.1.

## Changes in version 0.6.1

Released on 2025/XX/YY.

* Issue 37: fix release tarball by relying on `make dist`.

## Changes in version 0.6

Released on 2025/01/04.

* Remove lingering C++-11 support. The project now requires a C++14 compliant \ 
toolchain to build.

* Fix a Doxygen warning by deleting the `stack_cleaner` copy/assignment operator.

* Vendor the ATF m4 files from freebsd/atf@atf-0.22 ,

* `m4/lua.m4`: remove legacy `lua-config` support in favor of `pkg_config`.

* Fix a benign buffer overrun complaint from gcc 13.2.

* Rename `--with-atf` to `--enable-atf`.

## Changes in version 0.5

Released on 2024/11/25.

* Use more modern autotools macros.  Bump the minimum autoconf version to 2.68 to
  support this change.

* Modify build code to improve Lua 5.4 support.

* Replace `std::auto_ptr` use with `std::unique_ptr` use.  This improves C++
  standard support and fixes the build with newer C++ standards.