Roll ChromeOS Airmont AFDO profile from...

Roll ChromeOS Airmont AFDO profile from 86-4183.74-1598264968-benchmark-86.0.4240.6-r1 to 86-4183.74-1598264968-benchmark-86.0.4240.8-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-airmont-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: I2f3f3b12c4cb7c2d8f1d3cfdcd566235ab5ede58
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2378184Reviewed-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@{#802133}

chromeos/profiles/airmont.afdo.newest.txt

-chromeos-chrome-amd64-airmont-86-4183.74-1598264968-benchmark-86.0.4240.6-r1-redacted.afdo.xz
+chromeos-chrome-amd64-airmont-86-4183.74-1598264968-benchmark-86.0.4240.8-r1-redacted.afdo.xz