New 2017Q2 branch

[Jan Beich]

Mathieu Arnold <mat at FreeBSD.org> writes:

> - Firefox 52.0.2
> - Firefox-esr 45.8.0
> - Chromium 57.0.2987.110
> - Gnome 3.18.0
> - Qt4 4.8.7
> - gcc 4.9.4

These aren't new for 2017Q2 unlike, say, LLVM 4.0.0, libevent 2.1.8,
Mesa 13.0.6 or -237 / +573 ports count. 2017Q1 also lacked Boost 1.62 or
FFmpeg 3.2 which took a lot more effort/time.

Can you check the copypasta next time?