Roll src/third_party/SPIRV-Tools/src 73422a0a5ee1..35d98be3bc87 (2 commits)

https://chromium.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools.git/+log/73422a0a5ee1..35d98be3bc87

git log 73422a0a5ee1..35d98be3bc87 --date=short --no-merges --format='%ad %ae %s'
2019-08-29 stevenperron@google.com Amd ext to khr (#2811)
2019-08-29 bclayton@google.com spvtools::Optimizer - don't assume original_binary and optimized_binary are aliased (#2799)

Created with:
  gclient setdep -r src/third_party/SPIRV-Tools/src@35d98be3bc87

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,cwallez@chromium.org 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
TBR=radial-bots+chrome-roll@google.com,cwallez@chromium.org

Bug: None
Change-Id: Ie4f32ad58e611b030010a2ac587540b0ebd4cd86
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1777128Reviewed-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@{#691983}

DEPS

@@ -281,7 +281,7 @@ 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': '73422a0a5ee138c2787b7763f08ac935fb3203da',
+  'spv_tools_revision': '35d98be3bc87e34da31de5f484c57272078d57e8',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.