databases/cego: update 2.39.8 -> 2.39.9

• Added fixes for recovery procedure in CegoTableManager. Now the LSN is allocated at the beginning of critical operation to avoid double operations in case of a forced checkpoint. For this the CegoLogManager::nextLSN method has been introduced. Now it is no more ensured that the log is written with increasing LSN, so some logical parts of the recovery procedure in CegoRecoveryManager has been changed.
• In CegoBufferPool, the writeCheckPoint method still returned int value. This has been changed to unsigned long long

Submitted by: Bjoern Lemke <lemke@lemke-it.com>