(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.
* s/mach2.h: copied from the Emacs 18.59 distribution.
Don't define NO_REMAP, define START_FILES as
`pre-crt0.o' instead. Define LIB_MATH as `-lm', to override the
default `-lm -lc' (there is no libc on the NeXT).
* ymakefile (STARTFILES): Allow config.h to set this value even if
ORDINARY_LINK is defined.
* unexnext.c: Fix subdirectories for the machine dependent include
files for NeXTStep 3.0; #include <mach/mach.h> and
<mach-o/loader.h> instead of <mach.h> and <sys/loader.h>.
(getsectbyname): Remove prototype for this; the system #include
files take care of that.
(malloc_cookie): New variable.
(unexec_doit): Set malloc_cookie to the result returned by
malloc_freezedry.
* emacs.c (main): Declare malloc_cookie to be extern, so that we can
get the value set when we dumped and pass it to malloc_jumpstart.
* systime.h: The NeXT has a timezone function.
