CMake: GH1989, add wayland include dir to cmake
CMake: GH1989, add wayland include dir to cmake

On some Linux distributions (e.g  openSUSE) the wayland headers are in
a subdirectory.
Adding WAYLAND_CLIENT_INCLUDE_DIR to include_directories in CMakeLists.txt
will fix this issue.

KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools