Fix usage of ecm_create_qm_loader.

Generate-source-file macros should be used from the same CMakeLists.txt
file as the targets they generate files for.

src/CMakeLists.txt

@@ -1,5 +1,3 @@
-ecm_create_qm_loader(kconfig_QM_LOADER kconfig5_qt)
-
 add_subdirectory(core)
 add_subdirectory(gui)
 add_subdirectory(kconfig_compiler)

src/gui/CMakeLists.txt

@@ -9,8 +9,8 @@ set(libkconfiggui_SRCS
    kconfigskeleton.cpp
    kstandardshortcut.cpp
    kwindowconfig.cpp
-   ${kconfig_QM_LOADER}
 )
+ecm_create_qm_loader(libkconfiggui_SRCS kconfig5_qt)
 
 add_library(KF5ConfigGui ${libkconfiggui_SRCS})
 generate_export_header(KF5ConfigGui BASE_NAME KConfigGui)