[tlbuild] io.lines luatex rebuild

[Akira Kakuto]

Hi Norbert,

>> Affected files are only luatex-core.c (24766 bytes) and luatex-core.lua
>> (5583 bytes) in Build/source/texk/web2c/luatexdir/lua.

luatex-core.lua (5583 bytes) must have DOS line endings.
Correct luatex-core.lua is 5370 bytes.
Please commit luatex-core.lua with line endings \n, for
completeness. As I wrote previously, the file luatex-core.lua
is never used actually, and time stamp is OK at present.

Best,
Akira