Roll Fuchsia SDK from f76f6ad3d3f1 to b56bbf6095a1

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=master.tryserver.chromium.linux:fuchsia_arm64_cast_audio;master.tryserver.chromium.linux:fuchsia_x64_cast_audio
TBR=cr-fuchsia+bot@chromium.org

Change-Id: I254691f260d8a7d02b7e7fe093201b39adb162f0
Reviewed-on: https://chromium-review.googlesource.com/1029125
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@{#553834}

build/fuchsia/sdk.sha1

-f76f6ad3d3f1a431c80187d6b9066b6e5faa8a4e
\ No newline at end of file
+b56bbf6095a1d4a9deeefe4ef4e2f17806e932a3
\ No newline at end of file