Use lexical-binding in lisp/{term,nxml,language}

Use lexical-binding in lisp/{term,nxml,language}

* test/lisp/electric-tests.el:
* lisp/term/w32console.el:
* lisp/nxml/rng-util.el:
* leim/leim-ext.el: Use lexical-binding.

* lisp/international/titdic-cnv.el (tit-process-header)
(miscdic-convert):
* lisp/international/mule-cmds.el (leim-list-header):
* lisp/international/ja-dic-cnv.el (skkdic-convert):
Use lexical-binding in the generated file.