thorvg: Fix missing `<cstring>` includes for MinGW

Fixes #56894.

thirdparty/README.md

@@ -613,6 +613,8 @@ Files extracted from upstream source:
 See `thorvg/update-thorvg.sh` for extraction instructions. Set the version
 number and run the script.
 
+Patches in the `patches` directory should be re-applied after updates.
+
 
 ## vhacd
 

thirdparty/thorvg/patches/thorvg-pr1159-mingw-fix.patch

@@ -0,0 +1,73 @@
+diff --git a/thirdparty/thorvg/src/loaders/svg/tvgSvgLoader.cpp b/thirdparty/thorvg/src/loaders/svg/tvgSvgLoader.cpp
+index def8ae169a..cf103774c5 100644
+--- a/thirdparty/thorvg/src/loaders/svg/tvgSvgLoader.cpp
++++ b/thirdparty/thorvg/src/loaders/svg/tvgSvgLoader.cpp
+@@ -51,6 +51,7 @@
+ 
+ #define _USE_MATH_DEFINES       //Math Constants are not defined in Standard C/C++.
+ 
++#include <cstring>
+ #include <fstream>
+ #include <float.h>
+ #include <math.h>
+diff --git a/thirdparty/thorvg/src/loaders/svg/tvgSvgPath.cpp b/thirdparty/thorvg/src/loaders/svg/tvgSvgPath.cpp
+index 2b62315de8..32685ee620 100644
+--- a/thirdparty/thorvg/src/loaders/svg/tvgSvgPath.cpp
++++ b/thirdparty/thorvg/src/loaders/svg/tvgSvgPath.cpp
+@@ -50,6 +50,7 @@
+ 
+ #define _USE_MATH_DEFINES       //Math Constants are not defined in Standard C/C++.
+ 
++#include <cstring>
+ #include <math.h>
+ #include <clocale>
+ #include <ctype.h>
+diff --git a/thirdparty/thorvg/src/loaders/svg/tvgSvgSceneBuilder.cpp b/thirdparty/thorvg/src/loaders/svg/tvgSvgSceneBuilder.cpp
+index 8701fe32b1..ae17634f31 100644
+--- a/thirdparty/thorvg/src/loaders/svg/tvgSvgSceneBuilder.cpp
++++ b/thirdparty/thorvg/src/loaders/svg/tvgSvgSceneBuilder.cpp
+@@ -49,6 +49,7 @@
+ */
+ 
+ 
++#include <cstring>
+ #include <string>
+ #include "tvgMath.h"
+ #include "tvgSvgLoaderCommon.h"
+diff --git a/thirdparty/thorvg/src/loaders/svg/tvgSvgUtil.cpp b/thirdparty/thorvg/src/loaders/svg/tvgSvgUtil.cpp
+index d5b9cdcf7b..9f269b29a2 100644
+--- a/thirdparty/thorvg/src/loaders/svg/tvgSvgUtil.cpp
++++ b/thirdparty/thorvg/src/loaders/svg/tvgSvgUtil.cpp
+@@ -20,6 +20,7 @@
+  * SOFTWARE.
+  */
+ 
++#include <cstring>
+ #include <math.h>
+ #include <memory.h>
+ #include "tvgSvgUtil.h"
+diff --git a/thirdparty/thorvg/src/loaders/svg/tvgXmlParser.cpp b/thirdparty/thorvg/src/loaders/svg/tvgXmlParser.cpp
+index 2e3d5928d9..1571aa4e25 100644
+--- a/thirdparty/thorvg/src/loaders/svg/tvgXmlParser.cpp
++++ b/thirdparty/thorvg/src/loaders/svg/tvgXmlParser.cpp
+@@ -20,6 +20,7 @@
+  * SOFTWARE.
+  */
+ 
++#include <cstring>
+ #include <ctype.h>
+ #include <string>
+ 
+diff --git a/thirdparty/thorvg/src/savers/tvg/tvgTvgSaver.cpp b/thirdparty/thorvg/src/savers/tvg/tvgTvgSaver.cpp
+index 9450d80e88..9dd57e5a89 100644
+--- a/thirdparty/thorvg/src/savers/tvg/tvgTvgSaver.cpp
++++ b/thirdparty/thorvg/src/savers/tvg/tvgTvgSaver.cpp
+@@ -24,6 +24,8 @@
+ #include "tvgTvgSaver.h"
+ #include "tvgLzw.h"
+ 
++#include <cstring>
++
+ #ifdef _WIN32
+     #include <malloc.h>
+ #else

thirdparty/thorvg/src/loaders/svg/tvgSvgLoader.cpp

@@ -51,6 +51,7 @@
 
 #define _USE_MATH_DEFINES       //Math Constants are not defined in Standard C/C++.
 
+#include <cstring>
 #include <fstream>
 #include <float.h>
 #include <math.h>

thirdparty/thorvg/src/loaders/svg/tvgSvgPath.cpp

@@ -50,6 +50,7 @@
 
 #define _USE_MATH_DEFINES       //Math Constants are not defined in Standard C/C++.
 
+#include <cstring>
 #include <math.h>
 #include <clocale>
 #include <ctype.h>

thirdparty/thorvg/src/loaders/svg/tvgSvgSceneBuilder.cpp

@@ -49,6 +49,7 @@
 */
 
 
+#include <cstring>
 #include <string>
 #include "tvgMath.h"
 #include "tvgSvgLoaderCommon.h"

thirdparty/thorvg/src/loaders/svg/tvgSvgUtil.cpp

@@ -20,6 +20,7 @@
  * SOFTWARE.
  */
 
+#include <cstring>
 #include <math.h>
 #include <memory.h>
 #include "tvgSvgUtil.h"

thirdparty/thorvg/src/loaders/svg/tvgXmlParser.cpp

@@ -20,6 +20,7 @@
  * SOFTWARE.
  */
 
+#include <cstring>
 #include <ctype.h>
 #include <string>
 

thirdparty/thorvg/src/savers/tvg/tvgTvgSaver.cpp

@@ -24,6 +24,8 @@
 #include "tvgTvgSaver.h"
 #include "tvgLzw.h"
 
+#include <cstring>
+
 #ifdef _WIN32
     #include <malloc.h>
 #else