ia64-hpux patches from Steve Ellcey.

ia64-hpux patches from Steve Ellcey.
	* config/tc-ia64.c (md_shortopts, md_parse_option, md_show_usage):
	Change M to m for -milp32 or -mlp64 to match gcc.
	(dot_endp): Use bytes_per_address instead of 8.
	(emit_one_bundle): Use number_to_chars_littleendian instead of
	md_number_to_chars.
	(fix_insn): Likewise.
	(ia64_init): New function.
	(ia64_target_format): New function.
	(md_begin): Set endianness, arch, and machine as appropriate.
	* config/tc-ia64.h: (TARGET_BYTES_BIG_ENDIAN, md_number_to_chars):
	Make these macros depend on TE_HPUX macro.
	(TARGET_FORMAT): Define.
	(HOST_SPECIAL_INIT): Define.
	* config/te-hpux.h: New file.
	* configure.in: Add "ia64-*-hpux*" target to configure.
	* configure: Regenerate.