Merge pull request opencv#26563 from kallaballa:wayland_and_xkbcommon_missing_include_dirs

Missing include directories needed for wayland-util and xkbcommon opencv#26563

See: opencv#26561

### Pull Request Readiness Checklist

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

- [x] I agree to contribute to the project under Apache 2 License.
- [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
- [x] The PR is proposed to the proper branch
- [x] There is a reference to the original bug report and related work
- [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [ ] The feature is well documented and sample code can be built with the project CMake

Author: kallaballa

modules/highgui/CMakeLists.txt

@@ -83,6 +83,7 @@ if(WITH_WAYLAND AND HAVE_WAYLAND)
     endif()
   endif()
 
+  ocv_module_include_directories(${WAYLAND_CLIENT_INCLUDE_DIRS} ${XKBCOMMON_INCLUDE_DIRS})
 elseif(HAVE_QT)
   set(OPENCV_HIGHGUI_BUILTIN_BACKEND "QT${QT_VERSION_MAJOR}")
   add_definitions(-DHAVE_QT)