ia32 machine types in nALFS

["Wichmann, Mats D" <mats.d.wichmann@intel.com>]

We rooted out an obscure issue that was
making the <cond test="arch"> not work.
The checkins I made this morning may or
may not conceptually the "the right way"
to solve it, but it's the simplest fix
I could think of (see postscript for note
on what this issue was).

Now that the cond stuff works, we still
need an answer on the ia32 architecture,
where there are several different answers
given when asking what the machine type is
(i486, i686, others).  Smells to me like
those all ought to be equivalent from
the point of view of the xml.  How can
we accomplish this?