tests: Add Lua 5.0 test file

function fac(n)
    if n < 2 then
        return 1
    end
    return n * fac(n - 1)
end

./luac - < test.lua
Lua compiled with make ARFLAGS=rv CC="gcc -m32"
at commit 762c7370376dbd13cd8aeb4d8c8da0bb153269c3
luac compiled with make LUA=../lua CC="gcc -m32"
at commit d002063c4605d3ea12d419b34a23c562f9add318

Author: Lahvuun