Roll src/third_party/SPIRV-Tools/src dd3f8d4922eb..7a2d408dea60 (2 commits)

https://chromium.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools.git/+log/dd3f8d4922eb..7a2d408dea60

git log dd3f8d4922eb..7a2d408dea60 --date=short --first-parent --format='%ad %ae %s'
2020-01-30 afdx@google.com Fix typo in comment. (#3163)
2020-01-30 afdx@google.com spirv-fuzz: Arbitrary variable facts (#3165)

Created with:
  gclient setdep -r src/third_party/SPIRV-Tools/src@7a2d408dea60

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: I6b0e0d31f8cf2e66ab342c555525e506e506d08e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2032851Reviewed-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@{#737273}

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': 'dd3f8d4922ebd9b6275f68d7cfad5f34726ef462',
+  'spv_tools_revision': '7a2d408dea60aa1f8d53e123b01277c41b8f83b9',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.