Luac Github repository needs updating to work with Lua 5.5.0 codebase

[Jason Lethbridge]

It looks there's been enough changes in the Lua v5.5 headers that the 9
year old luac repository on GitHub (https://github.com/lua/luac) no
longer compiles against it.

[Sainan]

There should be an updated luac.c in the 5.5.0 release tarball.

-- Sainan

[Jason Lethbridge]

Thanks. The one in the source tarball is up to date and builds
perfectly but I thought I'd notify the mailing list about it since that
repository has also been building perfectly without any new commit for
the last 9 years