Avoid fork bomb caused by native compilation trampolines

Avoid fork bomb caused by native compilation trampolines

This upstream patch has been incorporated to fix the problem:

  Set `comp-no-spawn' earlier using -no-comp-spawn

  * src/emacs.c (standard_args): Add '-no-comp-spawn' cmd line option.
  * lisp/startup.el (command-line): Parse '-no-comp-spawn' cmd line
  option.
  * lisp/emacs-lisp/comp.el (comp-run-async-workers, comp-final):
  Use '-no-comp-spawn'.

Origin: upstream, commit: 5ad5b797f78dacb9c901d3c63bee05b1762fa94f
Bug-Debian: https://bugs.debian.org/1017817
Bug-Debian: https://bugs.debian.org/1017845
Forwarded: not-needed