qt6.qtvirtualkeyboard: cherry-pick r-b fixes

Already merged upstream, but 6.10.2 is some way off still.

Should fix #436698

pkgs/development/libraries/qt-6/modules/qtvirtualkeyboard.nix

@@ -5,6 +5,7 @@
   qtsvg,
   hunspell,
   pkg-config,
+  fetchpatch,
 }:
 
 qtModule {
@@ -16,4 +17,12 @@ qtModule {
     hunspell
   ];
   nativeBuildInputs = [ pkg-config ];
+  patches = [
+    # https://qt-project.atlassian.net/browse/QTBUG-137440
+    (fetchpatch {
+      name = "rb-link-core-into-styles.patch";
+      url = "https://github.com/qt/qtvirtualkeyboard/commit/0b1e8be8dd874e1fbacd0c30ed5be7342f6cd44d.patch";
+      hash = "sha256-Uk6EJOlkCRLUg1w3ljHaxV/dXEVWyUpP/ijoyjptbNc=";
+    })
+  ];
 }