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, bsc#1001951)

• An incorrect reference count was found in .setdevice. This issue lead to
  a use-after-free scenario, which could have been exploited for
  denial-of-service or, possibly, arbitrary code execution attacks.
  (CVE-2016-7978, bsc#1001951)

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

This update was imported from the SUSE:SLE-12:Update update project.