Roll silvermont AFDO profile from...

Roll silvermont AFDO profile from 80-3945.24-1574681176-benchmark-80.0.3964.0-r2 to 80-3945.42-1575283012-benchmark-80.0.3964.0-r2

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-silvermont-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/+/master/autoroll/README.md

Tbr: c-compiler-chrome@google.com
Change-Id: I7918481b83d6107e0b28482531e59ec3a5e7400d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1946536Reviewed-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@{#720684}

chromeos/profiles/silvermont.afdo.newest.txt

-chromeos-chrome-amd64-silvermont-80-3945.24-1574681176-benchmark-80.0.3964.0-r2-redacted.afdo.xz
\ No newline at end of file
+chromeos-chrome-amd64-silvermont-80-3945.42-1575283012-benchmark-80.0.3964.0-r2-redacted.afdo.xz
\ No newline at end of file