Roll Fuchsia SDK from 347788cdd047 to b50dfdfe8d6d

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_audio;luci.chromium.try:fuchsia_x64_cast_audio
TBR=cr-fuchsia+bot@chromium.org

Change-Id: I2e137b5c3f43c7c5f8811b0e481d7dc31f70c735
Reviewed-on: https://chromium-review.googlesource.com/c/1307113Reviewed-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@{#603754}

build/fuchsia/linux.sdk.sha1

-347788cdd047836f67a991285b6d93b93615d82c
\ No newline at end of file
+b50dfdfe8d6d893ea58526a56950d904ea0c9a26
\ No newline at end of file

build/fuchsia/mac.sdk.sha1

-aba94fa29d31e783ae10d9930d176336697d538a
\ No newline at end of file
+87575d6a191bf4f9e7c13d62f8b283de157aeaf7
\ No newline at end of file