Use define-minor-mode for less obvious cases.

Use define-minor-mode for less obvious cases.
* emacs-lisp/easy-mmode.el (define-minor-mode): Add :variable keyword.
* emacs-lisp/cl-macs.el (terminal-parameter, eq): Add setf method.
* international/iso-ascii.el (iso-ascii-mode):
* frame.el (auto-raise-mode, auto-lower-mode):
* composite.el (global-auto-composition-mode): Use define-minor-mode.