DB/Misc: Quest linking

The amphitheatre of anguise should continue regardless as wether player completed http://www.wowhead.com/quest=12932 or http://www.wowhead.com/quest=12954 as first quest in chain, not only if player did 12932 (quest offered if player did not do nagrand quests), if 12954 was taken no further quest would be offered once returned.