Security update for ghostscript-library (important)

This update for ghostscript-library fixes the following issues:

• Multiple security vulnerabilities have been discovered where
  ghostscript’s "-dsafer" flag did not provide sufficient protection
  against unintended access to the file system. Thus, a machine that would
  process a specially crafted Postscript file would potentially leak
  sensitive information to an attacker. (CVE-2013-5653, CVE-2016-7977,
  bsc#1001951)

• Insufficient validation of the type of input in .initialize_dsc_parser
  used to allow remote code execution. (CVE-2016-7979, bsc#1001951)

• An integer overflow in the gs_heap_alloc_bytes function used to allow
  remote attackers to cause a denial of service (crash) via specially
  crafted Postscript files. (CVE-2015-3228, boo#939342)