Roll Fuchsia SDK from ad481e2a17e6 to f39463541d7a

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

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: I422994c678006f6b009bf50fbe9fee8645be0cfe
Reviewed-on: https://chromium-review.googlesource.com/1104297
Commit-Queue: Fuchsia SDK Autoroller <fuchsia-sdk-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Reviewed-by: Fuchsia SDK Autoroller <fuchsia-sdk-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#567983}

build/fuchsia/sdk.sha1

-ad481e2a17e6557d794dfbfb6f929affffd3c1e2
+f39463541d7a9e067646a77d44d72631848c7ecf
\ No newline at end of file