elementary config: Fix to use ELEMENTARY_BASE_DIR for configure path

Summary:
"--with-elementary-base-dir" option was ignored by recent patches on elm_config.
The macro is being used in elm_theme. It should be syncronized.
The default value of the macro is ".elementary".

@fix

Test Plan: N/A

Reviewers: raster, cedric, jpeg

Reviewed By: jpeg

Differential Revision: https://phab.enlightenment.org/D5755

src/lib/elementary/elm_config.c

@@ -628,7 +628,7 @@ _elm_config_user_dir_snprintf(char       *dst,
                                         "(:config:)/elementary");
    else
      file_obj = efl_vpath_manager_fetch(EFL_VPATH_MANAGER_CLASS,
-                                        "(:home:)/.elementary");
+                                        "(:home:)/"ELEMENTARY_BASE_DIR);
    eina_strlcpy(dst, efl_vpath_file_result_get(file_obj), size);
    efl_del(file_obj);