Include <mach-o/reloc.h>.

Include <mach-o/reloc.h>.
(fgrowth): Initialize to zero.
(vmaddr_growth, dataseg_vmaddr, dataseg_vmend): New variables.
[NS_TARGET] (extreloff, nextrel, dysymtab, reloc_info): New variables.
(unexec_doit): Adjust file offsets of segments that follow the
enlarged data segment.  Adjust vmaddr of the SEG_LINKEDIT segment that
follows the data segment.
[NS_TARGET] (unexec_doit): Adjust file offsets in the LC_DYSYMTAB load
command that follows the data segment.  Zero out relocation entries
that fall within the data segment.