Security update for tiff (moderate)

This update for tiff fixes the following issues:

Security issues fixed:

• CVE-2018-19210: Fixed NULL pointer dereference in the
  TIFFWriteDirectorySec function (bsc#1115717).
• CVE-2017-12944: Fixed denial of service issue in the
  TIFFReadDirEntryArray function (bsc#1054594).
• CVE-2016-10094: Fixed heap-based buffer overflow in the _tiffWriteProc
  function (bsc#1017693).
• CVE-2016-10093: Fixed heap-based buffer overflow in the _TIFFmemcpy
  function (bsc#1017693).
• CVE-2016-10092: Fixed heap-based buffer overflow in the TIFFReverseBits
  function (bsc#1017693).
• CVE-2016-6223: Fixed out-of-bounds read on memory-mapped files in
  TIFFReadRawStrip1() and TIFFReadRawTile1() (bsc#990460).

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