* unexmacosx.c (mach_header, segment_command, vm_region, section)
[_LP64]: New defines.
(VM_REGION_BASIC_INFO_COUNT, VM_REGION_BASIC_INFO, LC_SEGMENT)
(MH_MAGIC) [_LP64]: Redefine.
(delta): Remove variable.
(curr_file_offset, pagesize): New variables.
(ROUNDUP_TO_PAGE_BOUNDARY): New macro.
(data_segment_old_fileoff): Initialize explicitly.
(print_region, unexec_regions_recorder, print_load_command_name)
(copy_segment, copy_data_segment): Use long format in printf.
(MAX_UNEXEC_REGIONS): Increase to 400.
(unexec_regions_recorder): Don't warn too many regions here.
(find_emacs_zone_regions): Warn too many regions here.
(print_load_command_name) [_LP64]: Show correct load command name.
(copy_segment, copy_data_segment): Use variable `curr_file_offset'.
Show starting virtual memory address. Don't show ending file offset.
(copy_symtab, copy_dysymtab, copy_twolevelhints): New argument DELTA.
(dump_it): Use new local variable `linkedit_delta' and pass to them.
Error if trying to handle multiple DATA segments.
(unexec): Initialize variable `pagesize'.