Roll src/third_party/SPIRV-Tools/src 66a682b6a8f9..4c027048d88b (3 commits)

https://chromium.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools.git/+log/66a682b6a8f9..4c027048d88b

git log 66a682b6a8f9..4c027048d88b --date=short --first-parent --format='%ad %ae %s'
2020-03-08 andreperezmaselco.developer@gmail.com spirv-fuzz: Add toggle access chain instruction transformation (#3211)
2020-03-08 vasniktel@gmail.com spirv-fuzz: Add fuzzer pass to permute function parameters (#3212)
2020-03-06 afdx@google.com spirv-fuzz: Use better function name (#3207)

Created with:
  gclient setdep -r src/third_party/SPIRV-Tools/src@4c027048d88b

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-chromium-autoroll
Please CC radial-bots+chrome-roll@google.com,jmadill@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/+/master/autoroll/README.md

Cq-Include-Trybots: luci.chromium.try:android_angle_vk32_deqp_rel_ng;luci.chromium.try:android_angle_vk32_rel_ng;luci.chromium.try:android_angle_vk64_deqp_rel_ng;luci.chromium.try:android_angle_vk64_rel_ng;luci.chromium.try:linux_angle_deqp_rel_ng;luci.chromium.try:linux-angle-rel;luci.chromium.try:win-angle-rel-32;luci.chromium.try:win-angle-rel-64;luci.chromium.try:win-angle-deqp-rel-32;luci.chromium.try:win-angle-deqp-rel-64
Bug: None
Tbr: radial-bots+chrome-roll@google.com,jmadill@google.com
Change-Id: I7174d53788ef2e266046857c44c76a6fae29d0cd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2094690
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#748161}

DEPS

@@ -286,7 +286,7 @@ 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': '66a682b6a8f973ba79b0e250221d53a4fbd11f4c',
+  'spv_tools_revision': '4c027048d88bcdd047ddace38081b6d6f896aba4',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.