[MediaPortal pvr addon] Addon update for Gotham

Updates the addon to version 1.8.9 to fix several outstanding issues and introduce new features.

Changelog:
- TSReader: Fixed: channel switching behavior when switching across tsbuffer files
- TSReader: Fixed: Windows share access in multiseat mode (return smb:// URI's instead of \\UNC paths to XBMC also for Windows)
- TSReader: Fixed: SD<->HD channel switching with "fast channel switching" enabled (add PAT detection to find the exact start of the new channel in the timeshift buffer file)
- Recordings: Add support for retrieving and storing the playback resume position (requires TVServerXBMC build 121 or higher)
- Recordings: Trigger a recording list update when the backend couldn't find the selected recording
- Fixed: potential out-of-bounds array access while accessing TV Card info
- Fixed: Hide smb password in debug xbmc.log file
- Added: support for retrieving channels from multiple specified groups (>1, < All groups) (requires TVServerXBMC build 122 or higher)
- Changed: drop support for TVServerXBMC builds older than 1.1.x.107
- Changed: more log notifications on errors