devel/lua-cffi 0.2.4 NetBSD

This is a portable C FFI for Lua, based on `libffi` and aiming to be mostly compatible with LuaJIT FFI, but written from scratch. Compatibility is preserved where reasonable, but not where not easily implementable (e.g. the parser extensions for 64-bit `cdata` and so on). Thanks to `libffi`, it works on many operating systems and CPU architectures. The `cffi-lua` codebase itself does not contain any non-portable code (with the exception of things such as Windows calling convention handling on x86, and some adjustments for big endian architectures).