Restore process-environment after portable dumping

* src/pdumper.c (struct dump_context): New member
old_process_environment.
(Fdump_emacs_portable): Record the original value of
process-environment.
(dump_unwind_cleanup): Restore the original values of
process-environment and post-gc-hook.
1 job for master in 60 minutes and 1 second (queued for 2 seconds)
Status Job ID Name Coverage
  Test
failed #1212
test-all

01:00:01

 
Name Stage Failure
failed
test-all Test The script exceeded the maximum execution time set for the job
make -C test check-expensive
make[1]: Entering directory '/builds/emacs/emacs/test'
rm -f ./*.tmp
make[2]: Entering directory '/builds/emacs/emacs/test'
make[3]: Entering directory '/builds/emacs/emacs/test'
ELC lisp/net/tramp-tests.elc
GEN lisp/net/tramp-tests.log
Pulling docker image gitlab/gitlab-runner-helper:x86_64-f100a208 ...
ERROR: Job failed: execution took longer than 1h0m0s seconds