gdm security and bug fix update

[1:2.16.0-56]

• Resolves: #239818 181302
• Fix tcp wrappers detection on 64-bit
  [1:2.16.0-55]
  Resolves: #196054
• Fix docs subpackage Requires
  [1:2.16.0-53]
  Resolves: #196054
• Add docs subpackage
  [1:2.16.0-52]
  Resolves: #226931
• Add te_IN translations
  [1:2.16.0-51]
  Resolves: #441971
• Make ctrl-alt-backspace at the login screen more robust
  [1:2.16.0-50]
  Resolves: #458331
• Add GDM to audio group by default.
  [1:2.16.0-49]
  Resolves: #474588
• Don’t crash if defined extended input device is unplugged
  Patch by Olivier Fourdan.
  [1:2.16.0-48]
  Resolves: #239818
• Rebuild with tcp_wrappers build requires
  [1:2.16.0-47]
  Resolves: #473262
• Fix pointer on tablet devices.