bug#34215: 27.0.50; Provide elisp access to Chinese pinyin-to-character mapping

[Eli Zaretskii]

> From: Eric Abrahamsen <eric@ericabrahamsen.net>
> Date: Thu, 31 Jan 2019 11:35:32 -0800
> 
> +(defun pinyin-convert ()
> +  "Convert text file pinyin.map into an elisp library.
> +The library is named pinyin.el, and contains the constant
> +`pinyin-character-map'."
> +  (let ((src-file (car command-line-args-left))
> +        (dst-file (cadr command-line-args-left))
> +        (coding-system-for-write 'utf-8-emacs))

This should be 'utf-8-unix.  There's no reason to write out stuff in
our internal encoding, as the file is not supposed to have any
characters not representable in UTF-8.

Otherwise, this LGTM.  Let's wait for a few days for more comments,
and then push.

Thanks.