HP merge changes by David Taylor, Edith Epstein, Jim Blandy, and Elena

HP merge changes by David Taylor, Edith Epstein, Jim Blandy, and Elena
Zannoni.

	* hpux-core.c (hpux_core_core_file_p): this function now
 	understands HPUX 10.30 thread info. Yes, the thread stacks can be
 	found in the corefile! Also, in hpux_core_core_file_p, if we
 	encounter a section with an unknown type, don't punt.  Instead,
 	just skip it.  Also, count the number of sections of known type
 	that we encounter.  If we encounter at least one good one, then
 	we'll declare that the file is a core file.  If we encounter any
 	unknown ones but some known ones, then we'll issue a warning (but
 	still declare it to be a core file). Also, correctly decide when a
 	file is not a core.
	(PROC_INFO_HAS_THREAD_ID): define if CORE_ANON_SHMEM defined.
	(CORE_ANON_SHMEM): define if not defined.
	(hpux_core_struct): add members lwpid and user_tid.
	(core_kernel_thread_id, core_user_thread_id): new macros.
	(make_bfd_asection): use bfd_alloc to allocate room for a copy of
 	the name before storing it in the bfd.
	(hpux_core_core_file_p): handle threads.

	* libhppa.h (GET_FIELD): protect against redefinition.
	(HPPA_WIDE): define.
	(GET_FIELD): define.
	(GET_BIT): define.
	(MASK): define.
	(CATENATE): define.
	(ELEVEN): define.
	(sign_extend): redefine.
	(assemble_6): define.
	(assemble_12): rewrite.
	(assemble_16): define.
	(assemble_16a): define.
	(assemble_17): rewrite.
	(assemble_22): define.