Roll SPIRV-Tools from f7da52775714 to c2b2b5788575 (8 revisions)

https://chromium.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools.git/+log/f7da52775714..c2b2b5788575

2020-11-04 jaebaek@google.com Add DebugValue for invisible store in single_store_elim (#4002)
2020-11-04 dnovillo@google.com Fix SSA re-writing in the presence of variable pointers. (#4010)
2020-11-04 afdx@google.com spirv-fuzz: Fixes to pass management (#4011)
2020-11-03 afdx@google.com spirv-fuzz: Add support for reining in rogue fuzzer passes (#3987)
2020-11-03 vasniktel@gmail.com spirv-fuzz: Fix assertion failure in FuzzerPassAddCompositeExtract (#3995)
2020-11-03 vasniktel@gmail.com spirv-fuzz: Fix invalid equation facts (#4009)
2020-11-03 vasniktel@gmail.com spirv-fuzz: Fix bugs in TransformationFlattenConditionalBranch (#4006)
2020-11-03 andreperezmaselco.developer@gmail.com spirv-fuzz: Fix bug related to transformation applicability (#3990)

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,courtneygo@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/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
Tbr: radial-bots+chrome-roll@google.com,courtneygo@google.com
Change-Id: I2b74240570caa853062f6cad97e48fd86d11d0a4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2520620Reviewed-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@{#824356}

DEPS

@@ -313,7 +313,7 @@ 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': 'f7da527757140ae701be58274ce6db2f4234d9ff',
+  'spv_tools_revision': 'c2b2b5788575f536e8ea0284d086f58b56aaee97',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.