* lisp/progmodes/ebnf-*.el: Use lexical-binding

* lisp/progmodes/ebnf-*.el: Use lexical-binding

* lisp/progmodes/ebnf-abn.el:
* lisp/progmodes/ebnf-bnf.el:
* lisp/progmodes/ebnf-dtd.el:
* lisp/progmodes/ebnf-ebx.el:
* lisp/progmodes/ebnf-iso.el:
* lisp/progmodes/ebnf-otz.el:
* lisp/progmodes/ebnf-yac.el: Enable lexical-binding.
* lisp/progmodes/ebnf2ps.el (ebnf-apply-style1)
(ebnf-insert-ebnf-prologue): Use lexical-binding.