Roll DirectX Shader Compiler from f9389db7c34d to 8fe99be640a1 (5 revisions)

https://chromium.googlesource.com/external/github.com/microsoft/DirectXShaderCompiler.git/+log/f9389db7c34d..8fe99be640a1

2024-05-14 sudonatalie@google.com [SPIR-V] Fix firstbit{high,low} elem check (#6607)
2024-05-14 sudonatalie@google.com [SPIR-V] Fix InterlockedMin/Max codegen (#6609)
2024-05-14 sudonatalie@google.com [SPIR-V] Allow const-evaluatable spec constants (#6606)
2024-05-14 sudonatalie@google.com [SPIR-V] Best effort const eval of vk::ext_literal (#6604)
2024-05-14 jeffno@microsoft.com PIX: Test for source locations for class methods (#5176)

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 rharrison@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: rharrison@google.com
Change-Id: I2dc5739807ee72a103640739ef871cfde9dd768c
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/188221
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 aebd49f..61b1a7f 100644
--- a/DEPS
+++ b/DEPS
@@ -287,7 +287,7 @@
   },
 
   'third_party/dxc': {
-    'url': '{chromium_git}/external/github.com/microsoft/DirectXShaderCompiler@f9389db7c34d3fe1f1a8bd5c7c1605f4ce49eec8',
+    'url': '{chromium_git}/external/github.com/microsoft/DirectXShaderCompiler@8fe99be640a1d6e2505c628d5f758d76c73b8cbe',
   },
 
   'third_party/dxheaders': {
diff --git a/third_party/dxc b/third_party/dxc
index f9389db..8fe99be 160000
--- a/third_party/dxc
+++ b/third_party/dxc
@@ -1 +1 @@
-Subproject commit f9389db7c34d3fe1f1a8bd5c7c1605f4ce49eec8
+Subproject commit 8fe99be640a1d6e2505c628d5f758d76c73b8cbe