[PATCH] Allow os/backtrace.c to compile on Solaris 10.

[Pat Kane]

On Wed, Nov 10, 2010 at 1:42 AM, Mark Kettenis <mark.kettenis at xs4all.nl> wrote:

> It should be fine to just include these headers unconditionally.  That
> would reduce the #ifdef clutter a bit.

I think you are right, but I did not want to break builds on other systems this
close to a release...