Roll Fuchsia SDK from 9f12ed7ee6da to 8b15beb626f5

The AutoRoll server is located here: https://autoroll.skia.org/r/fuchsia-sdk-chromium-autoroll

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

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.


CQ_INCLUDE_TRYBOTS=luci.chromium.try:fuchsia-arm64-cast;luci.chromium.try:fuchsia-x64-cast
TBR=cr-fuchsia+bot@chromium.org

Change-Id: Ib4b1355f3e5cffea831f5f14f788999fc6d28c58
Reviewed-on: https://chromium-review.googlesource.com/c/1490376Reviewed-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@{#635803}

build/fuchsia/linux.sdk.sha1

-9f12ed7ee6da5f4aa8004d82bff95ce7d5ce3292
+8b15beb626f57b6d7e1ede069a66c3b12ba5082c
\ No newline at end of file

build/fuchsia/mac.sdk.sha1

-cbd06349f62de43960936bf2c5804b29b769623e
+3a9a51413df3ba4a69a78c0e0b8a8cf65a3b41cd
\ No newline at end of file