bug#29180: 27.0.50; Bootstrapping on MINGW64 fails with "dumped_data_commit: memory exhausted"

[Eli Zaretskii]

> From: John Mastro <john.b.mastro@gmail.com>
> Date: Mon, 6 Nov 2017 13:27:40 -0800
> 
> Bootstrapping master (at commit 1d8f885) on MINGW64 fails for me with
> the following error:
> 
> [...]
> ./temacs --batch  --load loadup bootstrap
> Loading loadup.el (source)...
> Using load-path [...]
> Loading emacs-lisp/byte-run (source)...
> [... a bunch more ...]
> Loading c:/home/jbm/src/emacs/lisp/image.el (source)...
> dumped_data_commit: memory exhausted.
> Enlarge dumped_data[]!
> make[2]: *** [Makefile:738: bootstrap-emacs.exe] Error 127
> make[2]: Leaving directory '/c/home/jbm/src/emacs/src'
> make[1]: *** [Makefile:416: src] Error 2
> make[1]: Leaving directory '/c/home/jbm/src/emacs'
> make: *** [Makefile:1098: bootstrap] Error 2
> 
> I've attached the full output of "make bootstrap", plus a patch bumping
> the size of DUMPED_HEAP_SIZE. The patch allows the bootstrap to succeed,
> but I'm not sure if any investigation is required first.

Thanks, I pushed your change.  It's TRT to do in these cases.