RFC: KFAIL DejaGnu patch

[Andrew Cagney]

> P.S.: I was trying to find some test to try the setup_kfail on.  I went
> looking for the setup_xfail *-*-* calls but most don't have any comment
> why they are marked like that.  Then I've tried looking for the FAILs
> and see if I could find a bug entry for those -- but it is not a
> trivial task.  I guess we will need everybody's help and memories to
> gradually have things properly documented and related to the bug
> entries.

To be honest, I think just removing all but the most recent (i.e. in 
last two years) xfails might be for the best.

Andrew