Auto merge of #4851 - sfackler:verify-in-target, r=alexcrichton
authorbors <bors@rust-lang.org>
Thu, 21 Dec 2017 23:38:31 +0000 (23:38 +0000)
committerbors <bors@rust-lang.org>
Thu, 21 Dec 2017 23:38:31 +0000 (23:38 +0000)
Untar into the right dir when verifying

We'd previously dump it in the package's directory which is wrong when
working in a workspace.

Closes #4304

r? @alexcrichton


Trivial merge