Use utf-8 coding system for all our Elisp files

Use utf-8 coding system for all our Elisp files

* lisp/international/ja-dic-cnv.el:
* lisp/international/ja-dic-utl.el:
* lisp/international/kinsoku.el:
* lisp/international/kkc.el:
* lisp/language/japan-util.el:
* lisp/language/japanese.el:
* lisp/leim/quail/cyril-jis.el:
* lisp/leim/quail/hanja-jis.el:
* lisp/leim/quail/japanese.el:
* lisp/leim/quail/py-punct.el:
* lisp/leim/quail/pypunct-b5.el: Use utf-8 coding system.
* lisp/international/titdic-cnv.el: Use utf-8-emacs coding system.