Bug 259119

clang-cl can't link WebCore.dll of Windows Release build.

set CC=clang-cl
set CXX=clang-cl
perl .\Tools\Scripts\build-webkit --release --no-fatal-warnings

FAILED: bin64/WebCore.dll lib64/WebCore.lib 
cmd.exe /C "cd . && "C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\Common7\IDE\CommonExtensions\Microsoft\CMake\CMake\bin\cmake.exe" -E vs_link_dll --intdir=Source\WebCore\CMakeFiles\WebCore.dir --rc=C:\PROGRA~2\WI3CF2~1\10\bin\100190~1.0\x64\rc.exe --mt=C:\PROGRA~2\WI3CF2~1\10\bin\100190~1.0\x64\mt.exe --manifests  -- C:\PROGRA~1\LLVM\bin\lld-link.exe /nologo @CMakeFiles\WebCore.rsp  /out:bin64\WebCore.dll /implib:lib64\WebCore.lib /pdb:bin64\WebCore.pdb /dll /version:0.0 /machine:x64 /DEBUG /OPT:ICF /OPT:REF /INCREMENTAL:NO /INCREMENTAL:NO  /DELAYLOAD:d3d9.dll /DELAYLOAD:dxva2.dll /DELAYLOAD:evr.dll /DELAYLOAD:mf.dll /DELAYLOAD:mfplat.dll  && cd ."
LINK: command "C:\PROGRA~1\LLVM\bin\lld-link.exe /nologo @CMakeFiles\WebCore.rsp /out:bin64\WebCore.dll /implib:lib64\WebCore.lib /pdb:bin64\WebCore.pdb /dll /version:0.0 /machine:x64 /DEBUG /OPT:ICF /OPT:REF /INCREMENTAL:NO /INCREMENTAL:NO /DELAYLOAD:d3d9.dll /DELAYLOAD:dxva2.dll /DELAYLOAD:evr.dll /DELAYLOAD:mf.dll /DELAYLOAD:mfplat.dll /MANIFEST /MANIFESTFILE:bin64\WebCore.dll.manifest" failed (exit code 1) with the following output:
lld-link: error: undefined symbol: public: static class JSC::Structure * __cdecl JSC::Structure::create(class JSC::VM &, class JSC::JSGlobalObject *, class JSC::JSValue, class JSC::TypeInfo const &, struct JSC::ClassInfo const *, unsigned char, unsigned int)
>>> referenced by Source\WebCore\CMakeFiles\WebCore.dir\page\UserMessageHandlerDescriptor.cpp.obj
>>> referenced by Source\WebCore\CMakeFiles\WebCore.dir\page\UserMessageHandlersNamespace.cpp.obj
>>> referenced by Source\WebCore\CMakeFiles\WebCore.dir\__\__\WebCore\DerivedSources\unified-sources\UnifiedSource-f8afad56-19.cpp.obj