This fixes the following CVEs:
- in GD: CVE-2015-8874, CVE-2016-5766, CVE-2016-5767
- in mbstring: CVE-2016-5768
- in mcrypt: CVE-2016-5769
- in SPL: CVE-2016-5770, CVE-2016-5771
- in WDDX: CVE-2016-5772
- in zip: CVE-2016-5773
Signed-off-by: Michael Heimpold <mhei@heimpold.de>