Fix loaddefs quirk w.r.t. pinyin-convert

* lisp/international/titdic-cnv.el (pinyin-convert): Use
`generate-lisp-file' for the file.  This avoids having it scanned
by loaddefs-gen, which will trigger re-compilation of Emacs since
pinyin.el is generated after Emacs is built.

lisp/international/titdic-cnv.el

@@ -1191,10 +1191,7 @@ The library is named pinyin.el, and contains the constant
         (dst-file (cadr command-line-args-left))
         (coding-system-for-write 'utf-8-unix))
     (with-temp-file dst-file
-      (insert ";;; " (file-name-nondirectory dst-file)
-              "   -*- lexical-binding:t -*-
-;; This file is automatically generated from pinyin.map, by the
-;; function pinyin-convert.\n\n")
+      (generate-lisp-file-heading dst-file 'pinyin-convert)
       (insert "(defconst pinyin-character-map\n'(")
       (let ((pos (point)))
         (insert-file-contents src-file)
@@ -1214,7 +1211,7 @@ The library is named pinyin.el, and contains the constant
           (forward-line 1)))
       (insert ")\n\"An alist holding correspondences between pinyin syllables\
  and\nChinese characters.\")\n\n")
-      (insert "(provide 'pinyin)\n"))
+      (generate-lisp-file-trailer dst-file :compile t))
     (kill-emacs 0)))
 
 ;;; titdic-cnv.el ends here