benchstat: fix bad merge; AddFile now AddConfig

Change-Id: Ib710cac2d82ccd37821cd78b33550368c242d266
Reviewed-on: https://go-review.googlesource.com/36026
Run-TryBot: Russ Cox <rsc@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
1 file changed