Core/Misc: Use proper headers to optimize compile

src/server/scripts/Examples/example_creature.cpp

@@ -23,7 +23,9 @@ SDComment: Short custom scripting example
 SDCategory: Script Examples
 EndScriptData */
 
-#include "ScriptPCH.h"
+#include "ScriptMgr.h"
+#include "ScriptedCreature.h"
+#include "ScriptedGossip.h"
 
 // **** This script is designed as an example for others to build on ****
 // **** Please modify whatever you'd like to as this script is only for developement ****