cmake: GH1444, add wayland include dir to cmake
cmake: GH1444, add wayland include dir to cmake

On some Linux distributions (e.g  openSUSE, Fedora) 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