cmake: Fix locale build (#5385)

* cmake: Fix locale build

* Use OUTPUT instead of TARGET

---------

Co-authored-by: Edouard Choinière <[email protected]>

Author: HuidaeCho

locale/CMakeLists.txt

@@ -26,9 +26,9 @@ foreach(_locale ${_locales})
     DEPENDS generate_mo_files_dir
     COMMENT "Create locale specific directories")
   add_custom_command(
-    OUTPUT generate_mo_files_dir_${_locale}
+    OUTPUT ${OUTDIR}/${GRASS_INSTALL_LOCALEDIR}/${_locale}/LC_MESSAGES
     COMMAND ${CMAKE_COMMAND} -E make_directory
-            ${OUTDIR}/${GRASS_INSTALL_LOCALEDIR}/${_locale})
+            ${OUTDIR}/${GRASS_INSTALL_LOCALEDIR}/${_locale}/LC_MESSAGES)
 endforeach()
 unset(_locales)
 
@@ -41,7 +41,7 @@ foreach(po_file ${po_files})
 
   add_custom_target(
     generate_mo_files_${po_file_name} ALL
-    DEPENDS generate_mo_files_dir_${_locale}
+    DEPENDS ${OUTDIR}/${GRASS_INSTALL_LOCALEDIR}/${_locale}/LC_MESSAGES
     COMMENT "Generate mo files")
 
   add_custom_command(