Add 2014-10 build env update entry

## Update schedule

The updates will be rolled out to
**[travis-ci.org](https://travis-ci.org)** at **[14:00 UTC on the 27th of August](http://everytimezone.com/#2014-8-27,120,cn3)** and
to **[travis-ci.com](https://travis-ci.com)** at **[14:00 UTC on the 29th of August](http://everytimezone.com/#2014-8-29,120,cn3)**.
*HHVM