PATCH: Use __builtin_bswap32/64 for GCC >= 4.2

[Carlos O'Donell]

On Fri, Apr 6, 2012 at 2:45 PM, Roland McGrath <roland@hack.frob.com> wrote:
> I really hate the foo2.h, foo3.h naming trend.
> The file names should actually mean something.
>
> So let's call this one bits/byteswap-16.h instead.

I was just thinking the same thing, but because I'm swamped reviewing
other things I was going to let the reviewers here to whatever they
wanted :-)

Cheers,
Carlos.