Security update for gd

Open Source Vulnerabilities SUSE-SU-2016:2303-1

This update for gd fixes the following issues: * CVE-2016-6214: Buffer over-read issue when parsing crafted TGA file [bsc#991436] * CVE-2016-6132: read out-of-bands was found in the parsing of TGA files using libgd [bsc#987577] * CVE-2016-6128: Invalid color index not properly handled [bsc#991710] * CVE-2016-6207: Integer overflow error within _gdContributionsAlloc() [bsc#991622] * CVE-2016-6161: global out of bounds read when encoding gif from malformed input withgd2togif [bsc#988032] * CVE-2016-5116: avoid stack overflow (read) with large names [bsc#982176] * CVE-2016-6905: Out-of-bounds read in function read_image_tga in gd_tga.c [bsc#995034]