Roll src/third_party/SPIRV-Tools/src 60104cd97446..1346dd5de119 (4 commits)

https://chromium.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools.git/+log/60104cd97446..1346dd5de119

git log 60104cd97446..1346dd5de119 --date=short --first-parent --format='%ad %ae %s'
2020-03-23 alanbaker@google.com Disallow phis of images, samplers and sampled images (#3246)
2020-03-23 jaebaek@google.com Add data structure for DebugScope, DebugDeclare in spirv-opt (#3183)
2020-03-23 ehsannas@gmail.com Whitelist SPV_KHR_ray_tracing (#3241)
2020-03-23 arnfranke@yahoo.com Make file formatting comply with POSIX standards (#3242)

Created with:
  gclient setdep -r src/third_party/SPIRV-Tools/src@1346dd5de119

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,cnorthrop@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,cnorthrop@google.com
Change-Id: Icfe6dfe3e58c0f8a5a7e93bcee6ef2918b8c1e0c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2117481Reviewed-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@{#752804}

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': '60104cd97446877dad8ed1010a635218937a2f18',
+  'spv_tools_revision': '1346dd5de119d603686e260daf08f36958909a23',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.