WIP: Opcode tracing

[maage]

Implemented opcode tracing.

This version updates hash until we do something else. So my tests/target.py generates different maps. Without this feature same ops generate just increased count and I felt it was not enough.

You can test this with suite of: '0' '\0' 'zero' 'zero\n' and compare

py-afl-showmap -o out -i in -- python tests/target.py

This is tested with python 3.9 and afl-fuzz++ 3.00a. You need separate patch to support afl-fuzz++.

I tries to implement https://github.com/jwilk/python-afl/issues/15