move the temp dir for nextgen out of the www root

wp-content/plugins/nextgen-gallery/admin/functions.php

@@ -2,7 +2,7 @@
 
 if(preg_match('#' . basename(__FILE__) . '#', $_SERVER['PHP_SELF'])) { die('You are not allowed to call this page directly.'); }
 // Temporary file reservoir, which should exist and be property of www-data. Needed to bypass open_basedir
-define('NEXTGEN_TMP_FILES', '/opt/noblogs/www/wp-content/tmp/');
+define('NEXTGEN_TMP_FILES', '/opt/noblogs/tmp/nextgen');
 /**
  * nggAdmin - Class for admin operation
  *