Add dragon egg teleporting to build protection.

Closes #1977.

Author: wizjany

worldguard-bukkit/src/main/java/com/sk89q/worldguard/bukkit/util/Materials.java

@@ -1317,6 +1317,7 @@ public static boolean isConsideredBuildingIfUsed(Material type) {
         return type == Material.REPEATER
             || type == Material.COMPARATOR
             || type == Material.CAKE
+            || type == Material.DRAGON_EGG
             || Tag.FLOWER_POTS.isTagged(type)
             || Tag.CANDLES.isTagged(type)
             || Tag.CANDLE_CAKES.isTagged(type);