TOMOYO: Fix make namespacecheck warnings.

Commit efe836ab "TOMOYO: Add built-in policy support." introduced
tomoyo_load_builtin_policy() but was by error called from nowhere.

Commit b22b8b9f "TOMOYO: Rename meminfo to stat and show more statistics."
introduced tomoyo_update_stat() but was by error not called from
tomoyo_assign_domain().

Also, mark tomoyo_io_printf() and tomoyo_path_permission() static functions,
as reported by "make namespacecheck".

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>

security/tomoyo/domain.c

@@ -567,6 +567,7 @@ out:
 			tomoyo_write_log(&r, "use_profile %u\n",
 					 entry->profile);
 			tomoyo_write_log(&r, "use_group %u\n", entry->group);
+			tomoyo_update_stat(TOMOYO_STAT_POLICY_UPDATES);
 		}
 	}
 	return entry;