Roll ChromeOS Broadwell AFDO profile from...

Roll ChromeOS Broadwell AFDO profile from 87-4258.0-1601290734-benchmark-87.0.4279.0-r1 to 87-4258.0-1601290734-benchmark-87.0.4280.0-r1

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/cros-afdo-broadwell-chromium
Please CC c-compiler-chrome@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/master/autoroll/README.md

Tbr: c-compiler-chrome@google.com
Change-Id: I53894a3c2e5c6e0a0fda557ce2dc23bcde86b2c4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2447083Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#813495}

chromeos/profiles/broadwell.afdo.newest.txt

-chromeos-chrome-amd64-broadwell-87-4258.0-1601290734-benchmark-87.0.4279.0-r1-redacted.afdo.xz
+chromeos-chrome-amd64-broadwell-87-4258.0-1601290734-benchmark-87.0.4280.0-r1-redacted.afdo.xz