Update libafl_libfuzzer

[addisoncrump]

We recently updated libafl_libfuzzer in a lot of ways. This fetches the current "release" revision and pins the Rust version.

[google-cla]

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[addisoncrump]

CLA can be re-run, that's flagging a change in username.

[jonathanmetzman]

Is this working now? It would be useful for us to fix the libafl fuzzers?

[jonathanmetzman]

Still some kind of issue: cannot stat './target/release/libafl_libfuzzer_runtime.a': No such file or directory

[addisoncrump]

Yup, sadly, I cannot test fuzzbench locally due to some issues with docker on my system. Sorry for cluttering your CI 😅 This should do the trick.

[addisoncrump]

Also would love to run a new experiment with this 👍

[jonathanmetzman]

Have you run a PR based experiment with us before? If not I can open a PR for you. I'd love to run the experiment too!

[addisoncrump]

I've not, no -- please do 🙂