Roll vulkan-deps from a3a7851860ea to 20ef3c4c476b (4 revisions)

https://chromium.googlesource.com/vulkan-deps.git/+log/a3a7851860ea..20ef3c4c476b

Also rolling transitive DEPS:
  https://skia.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools from 4f321f862af9 to 76fe352190d6

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/vulkan-deps-skia-autoroll
Please CC ethannicholas@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in skia: https://bugs.chromium.org/p/skia/issues/entry

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/main/autoroll/README.md

Cq-Include-Trybots: skia/skia.primary:Build-Debian10-Clang-x86_64-Debug-Dawn;skia/skia.primary:Build-Debian10-Clang-x86_64-Release-ANGLE;skia/skia.primary:Test-Win10-Clang-NUC5i7RYH-GPU-IntelIris6100-x86_64-Debug-All-ANGLE
Bug: None
Tbr: ethannicholas@google.com
Change-Id: I71e7f1a4f3428e9d7b835e89db81cef86d09b2fc
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/551663
Commit-Queue: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
Bot-Commit: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
diff --git a/DEPS b/DEPS
index 6cb9fb8..2e9e2b5 100644
--- a/DEPS
+++ b/DEPS
@@ -43,10 +43,10 @@
   "third_party/externals/vulkanmemoryallocator"  : "https://chromium.googlesource.com/external/github.com/GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator@7de5cc00de50e71a3aab22dea52fbb7ff4efceb6",
   # vulkan-deps is a meta-repo containing several interdependent Khronos Vulkan repositories.
   # When the vulkan-deps revision is updated, those repos (spirv-*, vulkan-*) should be updated as well.
-  "third_party/externals/vulkan-deps"            : "https://chromium.googlesource.com/vulkan-deps@a3a7851860ea10027b92e17a12d39001c910ddd4",
+  "third_party/externals/vulkan-deps"            : "https://chromium.googlesource.com/vulkan-deps@20ef3c4c476b54979cb71f9d067acb3835749998",
   "third_party/externals/spirv-cross"            : "https://chromium.googlesource.com/external/github.com/KhronosGroup/SPIRV-Cross@ba3e6ffe037e47a17dd233a2e50eb0c0a434bb25",
   "third_party/externals/spirv-headers"          : "https://skia.googlesource.com/external/github.com/KhronosGroup/SPIRV-Headers.git@36c0c1596225e728bd49abb7ef56a3953e7ed468",
-  "third_party/externals/spirv-tools"            : "https://skia.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools.git@4f321f862af9498cdb6f8a6ab5840e45b83647f9",
+  "third_party/externals/spirv-tools"            : "https://skia.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools.git@76fe352190d672df9648ba8ba2b2554bf040b104",
   "third_party/externals/vulkan-headers"         : "https://chromium.googlesource.com/external/github.com/KhronosGroup/Vulkan-Headers@3be1df310be8963c29125c35fce25ee0af12ff70",
   "third_party/externals/vulkan-tools"           : "https://chromium.googlesource.com/external/github.com/KhronosGroup/Vulkan-Tools@6f57b1fa230f4ba88c34eeed9af31a4257df7fe8",
   #"third_party/externals/v8"                     : "https://chromium.googlesource.com/v8/v8.git@5f1ae66d5634e43563b2d25ea652dfb94c31a3b4",