Core/BlackrockSpire: add support for non-PCH compile

also add instance files to scriptloader

src/server/game/Scripting/ScriptLoader.cpp

@@ -106,6 +106,7 @@ void AddSC_boss_quatermasterzigris();
 void AddSC_boss_pyroguard_emberseer();
 void AddSC_boss_gyth();
 void AddSC_boss_rend_blackhand();
+void AddSC_instance_blackrock_spire();
 void AddSC_boss_razorgore();                 //Blackwing lair
 void AddSC_boss_vael();
 void AddSC_boss_broodlord();
@@ -706,6 +707,7 @@ void AddEasternKingdomsScripts()
     AddSC_boss_pyroguard_emberseer();
     AddSC_boss_gyth();
     AddSC_boss_rend_blackhand();
+    AddSC_instance_blackrock_spire();
     AddSC_boss_razorgore();                 //Blackwing lair
     AddSC_boss_vael();
     AddSC_boss_broodlord();