[still WIP] Development of libfuzzer-workshop for new libFuzzer version 2/2

[JulianVolodia]

This is continuation of change reffered in #5

Still WIP and if You, Dor1s , could have a look at it - and one (!) commit with plot twist to accept that.

Build on libFuzzer-update branch.

Commits try to be as small and modular as they could to ease reverting or changing them without any problem.

Cheers!