For results processor to work, we need to maintain the assumption that the cwd is equal to the currently running benchmark directory.

NOTRY=true
TBR=clemensh@chromium.org

Change-Id: I585c301dea846194652645973470786ad43aa280
Reviewed-on: https://chromium-review.googlesource.com/444784Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43280}