Roll DirectX Shader Compiler from b5c5b52ae8a9 to 79f55f267e02 (3 revisions)

** With manual intervention to add a new file to BUILD.gn **

https://chromium.googlesource.com/external/github.com/microsoft/DirectXShaderCompiler.git/+log/b5c5b52ae8a9..79f55f267e02

2024-01-05 grroth@microsoft.com Correct sampling param error in DXIL docs (#6131)
2024-01-05 python3kgae@outlook.com [NFC] Move hlsl::DiagnoseTranslationUnit to separate file. (#6126)
2024-01-05 davpeix@microsoft.com Write lit xml output as utf-8 (#6130)

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 kainino@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: kainino@google.com
Change-Id: I171aec84a4629ca6773868b819d23a20b3abe8bd
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/168362
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Kokoro: Austin Eng <enga@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Bot-Commit: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
diff --git a/third_party/gn/dxc/BUILD.gn b/third_party/gn/dxc/BUILD.gn
index b3c7636..aadb64e 100644
--- a/third_party/gn/dxc/BUILD.gn
+++ b/third_party/gn/dxc/BUILD.gn
@@ -2109,6 +2109,7 @@
     "$dawn_dxc_dir/tools/clang/lib/Sema/SemaExprObjC.cpp",
     "$dawn_dxc_dir/tools/clang/lib/Sema/SemaFixItUtils.cpp",
     "$dawn_dxc_dir/tools/clang/lib/Sema/SemaHLSL.cpp",
+    "$dawn_dxc_dir/tools/clang/lib/Sema/SemaHLSLDiagnoseTU.cpp",
     "$dawn_dxc_dir/tools/clang/lib/Sema/SemaInit.cpp",
     "$dawn_dxc_dir/tools/clang/lib/Sema/SemaLambda.cpp",
     "$dawn_dxc_dir/tools/clang/lib/Sema/SemaLookup.cpp",