[luau] include files

[Dean Takemori]

See one of these links to hear it from Linus himself.

<http://www.linuxmafia.com/faq/Kernel/usr-src-linux-symlink.html>
<http://www.ussg.iu.edu/hypermail/linux/kernel/0007.3/0587.html>

In short, the headers you use should match the _libraries_ you link
against (mainly glibc and libstdc++, but maybe gcc's internals too).
The exception being the asm link used by the kernel compile.

And note that the headers aren't generally required at all at
runtime, so you could theoretically replace your header files with
links to /dev/random and not notice anything different until you
tried to compile something.

-dean takemori

> From: Lou Rickard <lou_rickard at yahoo.com>
>
> How do, or should, the include files in /usr/include
> relate to the include files in /usr/src/linux/include?
>
> If you upgrade your kernel, should the
> /usr/src/linux/include/linux/ files replace your
> /usr/include/linux files?  It seems like they would,
> and yet, my system seems to run fine without doing
> that.