DB/Wintergrasp: four more Horde guards in Wintergrasp Keep that should only appear when it is held by Horde.

sql/updates/world/3.3.5/2016_10_08_04_world_335.sql

@@ -0,0 +1,2 @@
+--
+UPDATE `creature` SET `phaseMask`=64 WHERE `guid` IN (131265, 131268, 131271, 131270);