Use Debian/ububtu patchset

dev-qt/qtwebkit/files/libxml2_2.12.diff

@@ -0,0 +1,32 @@
+Description: fix build with libxml2 version 2.12.0
+Origin: upstream, https://commits.webkit.org/270977@main
+Last-Update: 2024-01-22
+
+--- a/Source/WebCore/xml/XSLTProcessor.h
++++ b/Source/WebCore/xml/XSLTProcessor.h
+@@ -64,7 +64,11 @@ public:
+ 
+     void reset();
+ 
++#if LIBXML_VERSION >= 21200
++    static void parseErrorFunc(void* userData, const xmlError*);
++#else
+     static void parseErrorFunc(void* userData, xmlError*);
++#endif
+     static void genericErrorFunc(void* userData, const char* msg, ...);
+     
+     // Only for libXSLT callbacks
+--- a/Source/WebCore/xml/XSLTProcessorLibxslt.cpp
++++ b/Source/WebCore/xml/XSLTProcessorLibxslt.cpp
+@@ -78,7 +78,11 @@ void XSLTProcessor::genericErrorFunc(voi
+     // It would be nice to do something with this error message.
+ }
+ 
++#if LIBXML_VERSION >= 21200
++void XSLTProcessor::parseErrorFunc(void* userData, const xmlError* error)
++#else
+ void XSLTProcessor::parseErrorFunc(void* userData, xmlError* error)
++#endif
+ {
+     PageConsoleClient* console = static_cast<PageConsoleClient*>(userData);
+     if (!console)