databases/cego: update 2.52.36 -> 2.52.39

• Fix added in CegoAggration decoding constructor. _pExpr must be set to 0, otherwise this might result in seg fault during tableset recovery.
• Added stdin mode for cego admin console cgadm, so instead of using option --batchfile, admin commands can be feed by pipe
• Cleanup and completion work done for CegoLogReader ( cglog ). For this also the abstract method CegoDecodable::getFormatted has been changed to getInfo, which provides a more compact output format. cglog is used to print ( binary ) redo logfiles in a human readable form.