File mp-5.62-config-qt6.patch of Package mp

Qt5 is out of support as of 2025-05-26.  usage of Qt in mp sources
seems simple enough to just replace Qt5Widgets by Qt6Widgets.
Older Qt6Widgets.pc files are missing "Requires: Qt6Core Qt6Gui".

--- a/config.sh	2024-12-07 08:52:47.000000000 +0100
+++ b/config.sh	2025-05-26 10:23:37.309979419 +0200
@@ -449,10 +449,10 @@
 if [ "$WITHOUT_QT5" = "1" ] ; then
     echo "Disabled"
 else
-    if chk_pkgconfig Qt5Widgets
+    if chk_pkgconfig Qt6Widgets
     then
-        TMP_CFLAGS="$(${PKG_CONFIG} --cflags Qt5Widgets 2>/dev/null) -fPIC"
-        TMP_LDFLAGS="$(${PKG_CONFIG} --libs Qt5Widgets 2>/dev/null)"
+        TMP_CFLAGS="$(${PKG_CONFIG} --cflags Qt6Widgets Qt6Core Qt6Gui 2>/dev/null) -fPIC"
+        TMP_LDFLAGS="$(${PKG_CONFIG} --libs Qt6Widgets Qt6Core Qt6Gui 2>/dev/null)"
 
         if USE_CXX=true chk_compiles "$(cat <<EOF
 #include <QtWidgets>