sync: from linuxdeepin/qt5integration

Synchronize source files from linuxdeepin/qt5integration.

Source-pull-request: linuxdeepin/qt5integration#234

CMakeLists.txt

@@ -105,9 +105,8 @@ endfunction()
 find_package(Dtk${VERSION_SUFFIX} REQUIRED COMPONENTS Widget)
 
 option(ENABLE_QT_XDG_ICON_LOADER "Enable QtXdgIconLoader" ON)
-find_package(Qt${QT_VERSION_MAJOR}XdgIconLoader)
-find_package(Qt${QT_VERSION_MAJOR}Xdg REQUIRED)
-if (NOT Qt${QT_VERSION_MAJOR}XdgIconLoader_FOUND)
+find_package(Qt${QT_VERSION_MAJOR}Xdg)
+if (NOT Qt${QT_VERSION_MAJOR}Xdg_FOUND)
     message(WARNING " Qt${QT_VERSION_MAJOR}XdgIconLoader Not Found, DISABLE QtXdgIconLoader !")
     set (ENABLE_QT_XDG_ICON_LOADER OFF)
 endif()