Roll SPIRV-Tools from 5fd92a7e0c84 to 7b2dd11dda7a (4 revisions)

https://chromium.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools.git/+log/5fd92a7e0c84..7b2dd11dda7a

2020-08-06 antonikarp@google.com spirv-fuzz: TransformationReplaceAddSubMulWithCarryingExtended (#3598)
2020-08-06 andreperezmaselco.developer@gmail.com spirv-fuzz: Add TransformationMakeVectorOperationDynamic (#3597)
2020-08-06 andreperezmaselco.developer@gmail.com spirv-fuzz: iterate over blocks in replace linear algebra pass (#3654)
2020-08-06 stefanomil@google.com spirv-fuzz: make outliner pass use additional transformations (#3604)

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,geofflang@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,geofflang@google.com
Change-Id: Ieeef1b49dc021050fe555b6e9b23aa9e1fbdd51c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2342756Reviewed-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@{#795846}

DEPS

@@ -302,7 +302,7 @@ 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': '5fd92a7e0c849229e042676d183cada18b006f01',
+  'spv_tools_revision': '7b2dd11dda7a44ecf0d3ef2a2e2205fba3f0f949',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.