apache_additional: allow mapping of httpd_sys_content_t files

apache_additional.te

@@ -1,10 +1,12 @@
-policy_module(apache_additional, 0.0.2)
+policy_module(apache_additional, 0.0.3)
 
 require {
   type httpd_t;
   type usr_t;
+  type httpd_sys_content_t;
 }
 
 apache_manage_sys_content(httpd_t)
 
 allow httpd_t usr_t:file map;
+allow httpd_t httpd_sys_content_t:file map;