crosperf: import time to autotest_runner.py

BUG=None
TEST=run a small crosperf test and it passes.

Change-Id: I9c4ee6487ef7e164d78a30821db0dcb76c6ccbc7
Reviewed-on: https://gerrit-int.chromium.org/38133
Reviewed-by: Luis Lozano <llozano@chromium.org>
Tested-by: Yunlian Jiang <yunlian@google.com>
Commit-Queue: Yunlian Jiang <yunlian@google.com>
1 file changed