[tor-qa] Introducing hardened builds for 64bit Linux

[Katya Titov]

Katya Titov:
> Georg Koppen:
>> Hi,
>> 
>> we are about to start a hardened Tor Browser series and the first
>> nightly for it is ready to get tested (on 64bit Linux systems):
> 
> Works well with my standard suite of tests. Does seem a little slow,
> though. I can't quantify it, but it "feels" slow. Using external apps
> with torsocks seems OK, so it's probably FF and not Tor.

May be a memory leak. After sending the last email I saw that FF was
using ~2GB of memory. Now, after running for 20 minutes and not using
TBB at all, it is consuming ~1GB of memory and slowly growing.

Running on Debian 8.2

-- 
kat