Add patch-emacs.c to fix the following problem as quoted from the PR:
The port patches src/mem-limits.h to declare the "lim_data" variable
as rlim_t (a 64-bit type), but src/emacs.c still defines it as an
integer. This makes the memory limit checking think that there are
zero bytes available.
Submitted by: Andrew Heybey <email@example.com>