[test] Use FULL_AOT_RUNTIME instead of MONOTOUCH.

mcs/class/System.Core/Test/System.Linq.Expressions/ExpressionTest_Call.cs

@@ -293,7 +293,7 @@ namespace MonoTests.System.Linq.Expressions {
 			Assert.AreEqual ("foo42", lamda (42, "foo"));
 		}
 
-#if !MONOTOUCH
+#if !FULL_AOT_RUNTIME
 		[Test]
 		public void CallDynamicMethod_ToString ()
 		{