Add static analysis subcommand

[louismerlin]

We could have a subcommand that could create a dictionary file for the fuzzers, by doing some static analysis on:

• a path that contains the code, through byte-value and string recovery
• the compiled runner binary, extracting strings and other helpful values

[louismerlin]

Maybe using https://github.com/AFLplusplus/AFLplusplus/blob/1c582b6aeec034b2c0ef650abd35352df7d78fa7/instrumentation/afl-llvm-dict2file.so.cc

[vanhauser-thc]

Maybe using https://github.com/AFLplusplus/AFLplusplus/blob/1c582b6aeec034b2c0ef650abd35352df7d78fa7/instrumentation/afl-llvm-dict2file.so.cc

that will require the cmplog feature flag but is a very good idea to use if that feature is present