The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/third_party/autotest/+/9244d9837eec43e28a74315f40c169bc8a8940dc

commit 9244d9837eec43e28a74315f40c169bc8a8940dc
Author: Jorge Lucangeli Obes <jorgelo@google.com>
Date: Sat Sep 08 20:32:46 2018

security_CpuVulnerabilities: Update for new kernels.

Newer kernels report several mitigations for some CPU vulnerabilities.

For example, on 4.4 kernels on Intel Core chips:
$ cat /sys/devices/system/cpu/vulnerabilities/spectre_v2
Mitigation: Full generic retpoline, IBPB, IBRS_FW

Update the test to support this, by representing expected mitigation
as a set. Right now we're still mainly interested in Retpoline for
Spectre v2, so keep tracking that.

BUG=chromium:880922
TEST=Passes on soraka (Intel big core 4.4)
TEST=Passes on caroline (Intel big core 3.18).
TEST=Passes on celes (Intel Atom 4.4).
TEST=Passes on kevin (ARM).

Change-Id: Iac5368953c455c00a7bccdaa8a5375fb98c33248
Reviewed-on: https://chromium-review.googlesource.com/1207295
Commit-Ready: Jorge Lucangeli Obes <jorgelo@chromium.org>
Tested-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>

[modify] https://crrev.com/9244d9837eec43e28a74315f40c169bc8a8940dc/client/site_tests/security_CpuVulnerabilities/security_CpuVulnerabilities.py

eve and others are no longer failing: https://stainless.corp.google.com/search?view=matrix&row=board_model&col=build&first_date=2018-09-04&last_date=2018-09-10&test=%5Esecurity%5C_CpuVulnerabilities%24&board=eve&exclude_cts=true&exclude_not_run=false&exclude_non_release=true&exclude_au=true&exclude_acts=true&exclude_retried=true&exclude_non_production=false