message: Output wayland xdg headers into proper directory
  Refs
diff: @@ -68,8 +68,8 @@ ELSEIF(USE_WAYLAND_WSI)
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DVK_USE_PLATFORM_WAYLAND_KHR")
  include_directories(${WAYLAND_INCLUDE_DIR})
  execute_process(COMMAND ${PKG_CONFIG} --variable=pkgdatadir wayland-protocols OUTPUT_VARIABLE protocol_dir OUTPUT_STRIP_TRAILING_WHITESPACE)
  - execute_process(COMMAND ${WAYLAND_SCANNER} client-header ${protocol_dir}/stable/xdg-shell/xdg-shell.xml xdg-shell-client-protocol.h
  - COMMAND ${WAYLAND_SCANNER} private-code ${protocol_dir}/stable/xdg-shell/xdg-shell.xml xdg-shell-protocol.c)
  + execute_process(COMMAND ${WAYLAND_SCANNER} client-header ${protocol_dir}/stable/xdg-shell/xdg-shell.xml ${CMAKE_BINARY_DIR}/xdg-shell-client-protocol.h
  + COMMAND ${WAYLAND_SCANNER} private-code ${protocol_dir}/stable/xdg-shell/xdg-shell.xml ${CMAKE_BINARY_DIR}/xdg-shell-protocol.c)
  include_directories(${CMAKE_BINARY_DIR})
  ELSE(USE_D2D_WSI)
  find_package(XCB REQUIRED)
  