deactivate two unit tests that relied on unspecified behavior

tests/unit/TestBasetypes.hx

@@ -123,9 +123,9 @@ class TestBasetypes extends Test {
 		// This also seems rather odd on some platforms.
 		var x : Array<Dynamic> = ["4", 1];
 		t(Std.is(x[0], String));
-		t(Std.is(x[0] + x[0], String));
+		//t(Std.is(x[0] + x[0], String));
 		t(Std.is(x[1] + x[1], Int));
-		t(Std.is(x[0] + x[1], String));
+		//t(Std.is(x[0] + x[1], String));
 	}
 
 	function testMath() {