Roll SPIRV-Tools from 3a02d1126872 to 8cc8b6562be9 (1 revision)

https://chromium.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools.git/+log/3a02d1126872..8cc8b6562be9

2021-06-24 alastair.donaldson@imperial.ac.uk spirv-fuzz: Add illustrative tests for new issues (#4347)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/spirv-tools-vulkan-deps-autoroll
Please CC radial-bots+chrome-roll@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

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

Tbr: radial-bots+chrome-roll@google.com
Change-Id: I325f02951558b146f2f8c3b828cb121af8f96409
Reviewed-on: https://chromium-review.googlesource.com/c/vulkan-deps/+/2985599
Bot-Commit: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>

• DEPS[diff]