* lisp/emacs-lisp/cl.el (dolist, dotimes, declare): Use advice-add to

* lisp/emacs-lisp/cl.el (dolist, dotimes, declare): Use advice-add to
override the default.
* lisp/emacs-lisp/cl-macs.el (cl-dolist, cl-dotimes): Rewrite without using
cl--dotimes/dolist.
* lisp/subr.el (dolist, dotimes, declare): Redefine them normally, even when
`cl' is loaded.

* lisp/emacs-lisp/nadvice.el (advice--normalize): New function, extracted
from add-advice.
(advice--strip-macro): New function.
(advice--defalias-fset): Use them to handle macros.
(advice-add): Use them.
(advice-member-p): Correctly handle macros.