Roll DirectX Shader Compiler from 6f1c8e2443cd to 9c154fb190a3 (2 revisions)

https://chromium.googlesource.com/external/github.com/microsoft/DirectXShaderCompiler.git/+log/6f1c8e2443cd..9c154fb190a3

2024-07-19 brioche@google.com [SPIR-V] Fix flattened SPIR-V variable codegen. (#6756)
2024-07-19 brioche@google.com [SPIR-V] Fix invalid isnan codegen (#6754)

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 cwallez@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: cwallez@google.com
Change-Id: I48ef30cb8dca810bd7846cce86eae97752a61a37
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/199215
Commit-Queue: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
Bot-Commit: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
diff --git a/DEPS b/DEPS
index aff5ad5..f9f7933 100644
--- a/DEPS
+++ b/DEPS
@@ -332,7 +332,7 @@
   },
 
   'third_party/dxc': {
-    'url': '{chromium_git}/external/github.com/microsoft/DirectXShaderCompiler@6f1c8e2443cdc80456a14c689b7ad061ae889841',
+    'url': '{chromium_git}/external/github.com/microsoft/DirectXShaderCompiler@9c154fb190a3f195aa20ace30f461799661ffe30',
   },
 
   'third_party/dxheaders': {
diff --git a/third_party/dxc b/third_party/dxc
index 6f1c8e2..9c154fb 160000
--- a/third_party/dxc
+++ b/third_party/dxc
@@ -1 +1 @@
-Subproject commit 6f1c8e2443cdc80456a14c689b7ad061ae889841
+Subproject commit 9c154fb190a3f195aa20ace30f461799661ffe30