[COMMIT] Cleanup HP-UX 10.20 support such that it builds again

[Randolph Chung]

> 	* hppa-hpux-nat.c: New file.

Mark, is there any particular reason why we can't fix hppah-nat.c
instead of introducing a new file altogether? Is hpux10.20 really so 
different from hpux11i?

if possible I'd like to avoid having so many pa files to maintain :)

randolph
-- 
Randolph Chung
Debian GNU/Linux Developer, hppa/ia64 ports
http://www.tausq.org/