comments to reflect that this file deals with SOM (an object file
format), rather than the PA (a cpu).
(Makefile.in): Chaned appropriately.
(config/pa/hppabsd.mh, config/pa/hppahpux.mh): Likewise.
* dbxread.c (somstab_build_psymtabs): Renamed from
pastab_build_psymtabs.
config files moved to an appropriate config/<cpu> subdirectory.
* nm-*, xm-*, tm-*: All native, host, and target files, which
get linked to nm.h, xm.h, and tm.h respectively by configure,
moved to appropriate config/<cpu> subdirectory.