Roll vulkan-deps from c943ccc4d398 to 29e87c1e6ee6 (3 revisions)

https://chromium.googlesource.com/vulkan-deps.git/+log/c943ccc4d398..29e87c1e6ee6

Changed dependencies:
* spirv-tools: 5a78d798f7..cc81529f4b
* vulkan-headers: 75a6b83f21..63637cb1c6
* vulkan-validation-layers: 3784a0d8b8..081dc9e60f

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-dawn-autoroll
Please CC bclayton@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Dawn: https://bugs.chromium.org/p/dawn/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

Bug: None
Tbr: bclayton@google.com
Change-Id: Id31d7f905cdcebf6a4ea8a3aa35ca55b5ab1c006
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/114880
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
Bot-Commit: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>

DEPS

@@ -142,7 +142,7 @@ deps = {
   },
 
   'third_party/vulkan-deps': {
-    'url': '{chromium_git}/vulkan-deps@c943ccc4d3988ebdb5defd0c0c9c53f579e2c948',
+    'url': '{chromium_git}/vulkan-deps@29e87c1e6ee62498e2ffb6f75becfdaa0fead8b8',
     'condition': 'dawn_standalone',
   },