Bite flag for Thunder Fang and Shadow Sneak

Bite flag was not set for Thunder Fang (422) but it was for Shadow Sneak (425). I guess someone wanted to add 16384 for Thunder Fang, Fire Fang and Ice Fang in a row and did it starting from the wrong number.
Merge pull request #1341 from Manectric-Rang/patch-15

Bite flag for Thunder Fang and Shadow Sneak