DB/Misc: Add missing items

sql/updates/world/2016_07_31_09_world.sql

@@ -0,0 +1,6 @@
+--
+DELETE FROM `item_template` WHERE `entry` IN (62336,62337,62312);
+INSERT INTO `item_template` (`entry`, `name`) VALUES
+(62336, 'Plans: <Random Jewelcrafting Design>'),
+(62337, 'Plans: <Random Leatherworking Pattern>'),
+(62312, 'Plans: <Random Blacksmithing Plan>');