Add a ChangeLog entry that was accidentally not committed

Add a ChangeLog entry that was accidentally not committed
with the change:

2002-05-11  Jason Thorpe  <thorpej@wasabisystems.com>

* Makefile.in (ALLDEPFILES): Remove alphanbsd-nat.c.
(alphanbsd-nat.o): Remove dependency list.
(alphanbsd-tdep.o): Add $(regcache_h) to dependency list.
* alphanbsd-nat.c: Delete.  Contents moved to...
* alphanbsd-tdep.c: ...here.
(_initialize_alphanbsd_tdep): Register core functions.
* config/alpha/nbsd.mh (NATDEPFILES): Remove alphanbsd-nat.o.