Roll DirectX Shader Compiler from 66287b27442d to d8ef89cdcfc3 (2 revisions)

https://chromium.googlesource.com/external/github.com/microsoft/DirectXShaderCompiler.git/+log/66287b27442d..d8ef89cdcfc3

2025-05-30 brioche@google.com [SPIR-V] Add payload to OpEmitMeshTasksEXT (#7485)
2025-05-30 brioche@google.com [SPIR-V] Fix r-value being used in mul intrinsic (#7489)

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

To file a bug in DirectX Shader Compiler: https://github.com/microsoft/DirectXShaderCompiler/issues/new/choose
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://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Bug: None
Tbr: shrekshao@google.com
Change-Id: I50307bb494f16f16bacbcbbc7996a77ea83578f0
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/244574
Bot-Commit: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
diff --git a/DEPS b/DEPS
index 35c660b..76a34ea 100644
--- a/DEPS
+++ b/DEPS
@@ -341,7 +341,7 @@
   },
 
   'third_party/dxc': {
-    'url': '{chromium_git}/external/github.com/microsoft/DirectXShaderCompiler@66287b27442d0af17a152d024a6deaadb075cd30',
+    'url': '{chromium_git}/external/github.com/microsoft/DirectXShaderCompiler@d8ef89cdcfc356cd983ef918c3fa324e16ba55ad',
   },
 
   'third_party/dxheaders': {
diff --git a/third_party/dxc b/third_party/dxc
index 66287b2..d8ef89c 160000
--- a/third_party/dxc
+++ b/third_party/dxc
@@ -1 +1 @@
-Subproject commit 66287b27442d0af17a152d024a6deaadb075cd30
+Subproject commit d8ef89cdcfc356cd983ef918c3fa324e16ba55ad