Roll Fuchsia SDK from b66dfd8c0b90 to 1c91c8faa342

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: I4592806534e9aacf5c3d9dd95aa478ec03b3b0ff
Reviewed-on: https://chromium-review.googlesource.com/c/1470959Reviewed-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@{#632038}

build/fuchsia/linux.sdk.sha1

-b66dfd8c0b90b2b9205b30ccd7469c21091f66c2
\ No newline at end of file
+1c91c8faa342f73db94a3973fd9759497f1f3c27
\ No newline at end of file

build/fuchsia/mac.sdk.sha1

-9fc3d6768829331dc1545b106ee2f51b07d98781
\ No newline at end of file
+f42d146adf49641d73ba7e4a8901578fa2114663
\ No newline at end of file