[Twisted-Python] Buildbot Updates: Addition of Debian 9, Removal of Ubuntu 12.04

[Glyph]

> On Jul 8, 2017, at 8:32 PM, Amber Hawkie Brown <hawkowl at atleastfornow.net> wrote:
> 
> Hello everyone,
> 
> I've just updated the Twisted buildbots to add the newest Debian release (with Python 2.7 and 3.5 as supported Python versions), and removed the now-EOL Ubuntu 12.04 buildbots, which ran Python 2.7.
> 
> The next version of Twisted will now correspondingly support Debian 9, and not support Ubuntu 12.04.
> 
> - Amber

Yay builder maintenance!

-g