x86 2.6 hardened profile rework

I've re-worked the hardened/x86/2.6 profile so that it is
independent
of hardened/x86, which is a 2.4-only profile. The 2.6
profile now has
hardened/ as its parent (i.e. "../..").  This
change means in particular
that we don't have to keep un-masking stuff that gets
masked for the 2.4
profile, but it does mean that anything that has to be set
for both
profiles now needs to be done in the x86/2.6 directory as
well as
just x86.

The net result is intended to be no change for either 2.4 or
2.6 profile
users; this is just a notice to ensure you're all aware of
it, just in
case I made a mistake.

-- 
Kevin F. Quinn