Only use the AOT code path for the AOT profile

In the Unity repo we now use only the AOT profile for IL2CPP, so there
is no need to take this AOT-friendly code path in the non_AOT profile.

Author: joshpeterson

mcs/class/corlib/System.Reflection/MonoProperty.cs

@@ -378,9 +378,7 @@ public override object GetValue (object obj, object[] index)
 		{
 			if (index == null || index.Length == 0) {
 				/*FIXME we should check if the number of arguments matches the expected one, otherwise the error message will be pretty criptic.*/
-// Once we ship the changes to make il2cpp always use the unityaot profile, we should change
-// this define to be UNITY_AOT. for now though, we'll take the AOT-friendly code path in all profiles.
-#if !FULL_AOT_RUNTIME && !UNITY
+#if !FULL_AOT_RUNTIME && !UNITY_AOT
 				if (cached_getter == null) {
 					MethodInfo method = GetGetMethod (true);
 					if (!DeclaringType.IsValueType && !method.ContainsGenericParameters) { //FIXME find a way to build an invoke delegate for value types.