Updated graphite2 packages fix security vulnerabilities

An out-of-bounds write triggered with a maliciously crafted Graphite font could lead to a crash or potentially code execution (CVE-2017-5436). Multiple vulnerabilities have been found in the Graphite font rendering engine which might result in denial of service or the execution of arbitrary code if a malformed font file is processed (CVE-2017-7771, CVE-2017-7772, CVE-2017-7773, CVE-2017-7774, CVE-2017-7775, CVE-2017-7776, CVE-2017-7777, CVE-2017-7778).