LLVM MSVC build: Fix configuration for LLVM>=17 when its source is fr…

…eshly cloned

LLVM 18 doesn't allow this defect anymore, fixes 6f33b11

buildscript/modules/libva.cmd

@@ -11,7 +11,7 @@
 @cd libva
 @for /f tokens^=2^ delims^=/^ eol^= %%a in ('git symbolic-ref --short refs/remotes/origin/HEAD 2^>^&^1') do @git checkout %%a
 @git pull --progress --tags --recurse-submodules origin
-@git checkout 2.20.0
+@git checkout 2.21.0
 )
 @IF %gitstate% GTR 0 echo.
 @IF "%pkgconfigstate%"=="0" GOTO nolibva

buildscript/modules/llvm.cmd

@@ -35,6 +35,7 @@
 @git checkout -f FETCH_HEAD
 @git clean -df
 @echo.
+@set llvmsrcver=%updllvmsrcver:.=%
 )
 
 @rem Apply is_trivially_copyable patch

buildscript/modules/mesonsubprojects.cmd

@@ -96,10 +96,10 @@ set "exitloop="
 )
 @if %gitstate% GTR 0 for /f delims^=^ eol^= %%a in ('dir /b /a^:d "%devroot%\mesa\subprojects\DirectX-Header*" 2^>^&1') do @IF EXIST "%devroot%\mesa\subprojects\%%~nxa\" (
 @cd "%devroot%\mesa\subprojects\%%~nxa"
-@rem echo Using DirectX-Headers stable release...
+@echo Using DirectX-Headers stable release...
 @for /f tokens^=2^ delims^=/^ eol^= %%a in ('git symbolic-ref --short refs/remotes/origin/HEAD 2^>^&^1') do @git checkout %%a
 @git pull -f --progress --tags --recurse-submodules origin
-@git checkout 7a9f4d06911d30eecb56a4956dab29dcca2709ed
+@git checkout v1.613.0
 @cd "%devroot%\mesa"
 )
 @if %gitstate% GTR 0 echo.

releasenotes.md

@@ -1,3 +1,5 @@
+### Build script
+- LLVM MSVC build: Fix configuration for LLVM>=17 when its source is freshly cloned, LLVM 18 doesn't allow this defect anymore, fixes 6f33b110.
 ### Distribution
 - There is no need to patch Vulkan drivers JSON files to fix them since 24.1.0-devel, [Vulkan JSON generation has been fixed](https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27468).
 # 24.0.2