Roll src/third_party/SPIRV-Tools/src 6e85d1a6fc75..20bbfb6f4da6 (2 commits)

https://chromium.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools.git/+log/6e85d1a6fc75..20bbfb6f4da6


git log 6e85d1a6fc75..20bbfb6f4da6 --date=short --no-merges --format='%ad %ae %s'
2018-10-22 33432579+alan-baker@users.noreply.github.com Layout checks should recurse through runtime arrays (#1999)
2018-10-22 33432579+alan-baker@users.noreply.github.com Better checking of the index operand (#1992)


Created with:
  gclient setdep -r src/third_party/SPIRV-Tools/src@20bbfb6f4da6

The AutoRoll server is located here: https://autoroll.skia.org/r/spirv-tools-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.


TBR=dsinclair@chromium.org

Change-Id: I8c5827547dc76f931152dce4738dbd85ea39e0a3
Reviewed-on: https://chromium-review.googlesource.com/c/1292259Reviewed-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@{#601569}

DEPS

@@ -219,7 +219,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.
-  'spv_tools_revision': '6e85d1a6fc75c4d37ccf7772fbb05e11b4fd69b0',
+  'spv_tools_revision': '20bbfb6f4da60c3bdf1aa3a100ee7b8000ad4022',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.