Add missing panic marker

Author: lucic71

tests/unit/switch_while_in_switch_break.cpp

@@ -1,6 +1,7 @@
 // Copyright (c) 2022-present INESC-ID.
 // Distributed under the MIT license that can be found in the LICENSE file.
 
+// panic
 #include <cassert>
 
 int while_in_switch_break(int n) {