Updated moodle package fix security vulnerabilities

The assignment module in Moodle before 2.4.4 was not checking capabilities for users downloading all assignments as a zip (CVE-2013-2079). The Gradebook’s Overview report in Moodle before 2.4.4 was showing grade totals that may have incorrectly included hidden grades (CVE-2013-2080). When registering a site on a hub (not Moodle.net) site in Moodle before 2.4.4, information was being sent to the hub regardless of settings chosen (CVE-2013-2081). There was no check of permissions for viewing comments on blog posts in Moodle before 2.4.4 (CVE-2013-2082). Form elements named using a specific naming scheme were not being filtered correctly in Moodle before 2.4.4 (CVE-2013-2083).