Update level_moves.txt

Kyurem-B and Kyurem-W can't learn Scary Face and Glaciate
http://pokemon-online.eu/forums/showthread.php?18490-Kyurem-B-and-Kyurem-W-are-not-supposed-to-learn-Glaciate
Merge pull request #385 from turbedi/patch-45

Update level_moves.txt