Suggest obsoleting some of the HPPA ports

[Joel Brobecker <brobecker@gnat.com>]

hello,

I am currently looking at the list of "supported" targets and found
several ones that I won't be able to convert nor support: 
  - hppa*-*-bsd*
  - hppa*-*-pro*
  - hppa*-*-osf*

Unless somebody else with access to the appropriate machines is willing
to undertake the conversion for these targets, I suggest we obsolete
them.

This will leave us with the following triplets:

  - (target) - hppa*64*-*-hpux11*
             - hppa*-*-hpux*
             - hppa*-*-hiux*           (anybody knows what this is?)

  - (host)   - hppa*-*-hiux*
             - hppa*-*-hpux10.20
             - hppa*64*-*-hpux11*
             - hppa*-*-hpux11*
             - hppa*-*-hpux*

ACT does not have a system where hppa64 can be supported, so I am using
a machine under the HP/Compaq program. These machines come with a pretty
bare OS, and are a bit of a pain to use, but it would be a shame to lose
the hppa64 target. I think I've finally set up an environment where I
can build and test GDB there, but no CVS :-(. Anybody willing to take
over the conversion of this target would really be welcome... Otherwise,
I'll do the conversion too.

As for the proposal to obsolete the hppa-*-*(bsd|pro|osf)*
hosts/targets, this would allow us to get rid of the following files in
the config/pa directory:

    BSD: hppabsd.mt
         tm-hppab.h

         hppabsd.mh
         nm-hppab.h
         xm-hppab.h
         hppab-nat.c

    PRO: hppapro.mt
         tm-pro.h
         op50-rom.c
         w89k-rom.c

    OSF: hppaosf.mt
         tm-hppao.h

         hppaosf.mh
         nm-hppao.h
         hppam3-nat.c

There are some other files that don't seem to be used, so I'm thinking
of deleting them:

         hpux1020.mt
         hpux11.mt
         hpux11w.mt

-- 
Joel