Rename comp-run.el and comp-cstr.el private functions

Rename comp-run.el and comp-cstr.el private functions

* lisp/emacs-lisp/comp-run.el (native-compile-async-skip-p)
(comp-async-runnings, comp-effective-async-max-jobs)
(comp-accept-and-process-async-output, comp-run-async-workers)
(comp-trampoline-search): rename using '--' separator convention for
private functions.
* lisp/emacs-lisp/comp-cstr.el
(comp-cstr-copy, comp-cstrs-homogeneous, comp-split-pos-neg)
(comp-normalize-valset, comp-union-valsets)
(comp-intersection-valsets, comp-normalize-typeset)
(comp-union-typesets, comp-intersect-two-typesets)
(comp-intersect-typesets, comp-range-union)
(comp-range-intersection, comp-range-negation, comp-cstr-add-2)
(comp-cstr-sub-2, comp-cstr-union-homogeneous-no-range)
(comp-cstr-union-homogeneous, comp-cstr-union-1-no-mem)
(comp-cstr-union-1, comp-cstr-union-make)
(comp-cstr-intersection-make): Likewise.

(cherry picked from commit fd61cf3976c1c24b5a58923f6520f88db060cacd)