comp: Add comp-common.el

comp: Add comp-common.el

* lisp/emacs-lisp/comp-common.el: New file.
(comp-common): New group.
(native-comp-verbose, native-comp-never-optimize-functions)
(native-comp-async-env-modifier-form, comp-limple-calls)
(comp-limple-sets, comp-limple-assignments)
(comp-limple-branches, comp-limple-ops)
(comp-limple-lock-keywords, comp-log-buffer-name, comp-log)
(native-comp-limple-mode, comp-log-to-buffer)
(comp-ensure-native-compiler, comp-trampoline-filename)
(comp-eln-load-path-eff): Move here
* lisp/emacs-lisp/comp-run.el (comp-common): Require.
* lisp/emacs-lisp/comp.el (comp-common): Require.
* admin/MAINTAINERS: Add comp-common.el
* lisp/Makefile.in (COMPILE_FIRST): Likewise.
* src/Makefile.in (elnlisp): Likewise.