tests: Demarshalling of very long array/string lengths.
Attempting to demarshal message with array or string longer than its body should return failure. Handling the length correctly is tricky when it gets to near-UINT32_MAX values. Unexpected overflows can cause crashes and other security issues. These tests verify that demarshalling such message gives failure instead of crash. v2: Added consts, serialized opcode and size properly, updated style. Reviewed-by: Pekka Paalanen <firstname.lastname@example.org> Acked-by: Derek Foreman <email@example.com>