Auto merge of #2347 - alexcrichton:robust-tests, r=wycats
authorbors <bors@rust-lang.org>
Mon, 1 Feb 2016 18:04:03 +0000 (18:04 +0000)
committerbors <bors@rust-lang.org>
Mon, 1 Feb 2016 18:04:03 +0000 (18:04 +0000)
* Remove the XDG_CONFIG_HOME environment variable as we're resetting HOME
* Add GIT_CONFIG_NOSYSTEM to encourage git to not read that configuration

Closes #2345


Trivial merge