bug#25074: Very fast battery status function using upowerd

[Eli Zaretskii]

> From: Evgeny Zajcev <lg.zevlg@gmail.com>
> Date: Wed, 30 Nov 2016 19:50:58 +0300
> Cc: 25074@debbugs.gnu.org
> 
> 2016-11-30 19:46 GMT+03:00 Eli Zaretskii <eliz@gnu.org>:
> 
>  > From: Evgeny Zajcev <lg.zevlg@gmail.com>
>  > Date: Wed, 30 Nov 2016 14:53:16 +0300
>  >
>  > Hello, here is very fast dbus based battery status function, implemented
>  > using upower interface. Could you please include it in battery.el ?
>  >
>  > 
> https://github.com/zevlg/emacs/commit/fdd371ca88e55895b1cf8b93165b6680dd1ec9f0
> 
>  Thanks, but could you please include the patch with your message
>  posted here? "git format-patch" is fine. That would make applying
>  the patch easier.
> 
> aha, here you are

Thanks, pushed to master.

In the future, please remember to put the ':version' tag in the new
defcustoms you introduce.