toolchain-utils: fix remaining cros lint errors.

BUG=chromium:570458
TEST='crosperf/run_tests.sh' passes.

Change-Id: I5566349cc97233e1ddb6d98121cd6f44e14bf0a9
Reviewed-on: https://chrome-internal-review.googlesource.com/249482
Commit-Ready: Rahul Chaudhry <rahulchaudhry@google.com>
Tested-by: Rahul Chaudhry <rahulchaudhry@google.com>
Reviewed-by: Luis Lozano <llozano@chromium.org>
4 files changed