OpenSK panic in corpus testing (tracking)

1. Track kernel panic: some inputs in the corpus generated by the gray-box fuzzer caused a kernel crash when tested on hardware.
2. OpenSK's main currently has 5 explicit panics (at [L57](https://github.com/google/OpenSK/blob/master/src/main.rs#L57), [L96](https://github.com/google/OpenSK/blob/master/src/main.rs#L96), [L134](https://github.com/google/OpenSK/blob/master/src/main.rs#L134), [L209](https://github.com/google/OpenSK/blob/master/src/main.rs#L209) and [L353/355](https://github.com/google/OpenSK/blob/master/src/main.rs#L353)), consider keeping/changing the behaviour for fuzzing sake.