Roll src/third_party/SPIRV-Tools/src b97057e7f747..1b3441036a8f (6 commits)

https://chromium.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools.git/+log/b97057e7f747..1b3441036a8f

git log b97057e7f747..1b3441036a8f --date=short --first-parent --format='%ad %ae %s'
2020-01-24 syoussefi@google.com Fix chromium build (#3152)
2020-01-24 dneto@google.com Clarify mapping of target env to SPIR-V version (#3150)
2020-01-24 greg@lunarg.com Use dummy switch instead of dummy loop in MergeReturn pass. (#3151)
2020-01-23 alanbaker@google.com Fix structured exit validation (#3141)
2020-01-23 dneto@google.com Add spvParseVulkanEnv (#3142)
2020-01-23 jaebaek@google.com Handle conflict between debug info and existing validation rule (#3104)

Created with:
  gclient setdep -r src/third_party/SPIRV-Tools/src@1b3441036a8f

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,tobine@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,tobine@google.com
Change-Id: Ic32ead37384c4a4e5b28553673bcbde9fb3a48e2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2024582Reviewed-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@{#735792}

DEPS

@@ -292,7 +292,7 @@ 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': 'b97057e7f7473ee56ba485b38784f1a4fdce94dc',
+  'spv_tools_revision': '1b3441036a8f178cb3b41c1aa222b652db522a88',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.