* Portability fixes from p3:
coffcode.h (coff_write_relocs): removed sanity check until it
works on all targets (per advice from sac).
config/hp9000.mh: new file to define USG.
hppa.c: #undef hppa before the JUMP_TABLE.
hosts/hppahpux.h: #define NATIVE_HPPAHPUX_COMPILER if not
__STDC__.
targets.c (bfd_target_list): if NATIVE_HPPAHPUX_COMPILER, make
local variable target volatile to avoid mysterious bug in
HP9000/700 cc.