Refactoring: simplify definition of some internal variables.

In some cases, we never specbind internal objects, so they don't have
to be symbols.  Rather than using DEFSYM/DEFVAR and then uninterning
the symbols, use plain static variables.  Call staticpro for all of
them, to protect them from the garbage collector.

* src/eval.c (syms_of_eval): Use a static variable for

* src/emacs-module.c (syms_of_module): Use static variables for
Vmodule_refs_hash, Vmodule_runtimes, and Vmodule_environments.
1 job for master in 60 minutes and 1 second (queued for 3 seconds)
Status Job ID Name Coverage
failed #1426


Name Stage Failure
test-all Test The script exceeded the maximum execution time set for the job
  GEN      lisp/international/ccl-tests.log
ELC lisp/international/mule-tests.elc
GEN lisp/international/mule-tests.log
ELC lisp/international/mule-util-tests.elc
GEN lisp/international/mule-util-tests.log
ELC lisp/international/ucs-normalize-tests.elc
GEN lisp/international/ucs-normalize-tests.log
Pulling docker image gitlab/gitlab-runner-helper:x86_64-f100a208 ...
ERROR: Job failed: execution took longer than 1h0m0s seconds