Scripts - Fixed missing headers

Without these, the server would not compile when disabling precompiled headers (PCH)

src/server/scripts/Events/hallows_end.cpp

@@ -9,6 +9,7 @@
 #include "LFGMgr.h"
 #include "PassiveAI.h"
 #include "Group.h"
+#include "CellImpl.h"
 
 ///////////////////////////////////////
 ////// ITEMS FIXES, BASIC STUFF

src/server/scripts/Spells/spell_quest.cpp

@@ -19,6 +19,7 @@
 #include "MapManager.h"
 #include "CreatureTextMgr.h"
 #include "SpellAuraEffects.h"
+#include "CellImpl.h"
 
 // Ours
 class spell_q11065_wrangle_some_aether_rays : public SpellScriptLoader