change afl logic to afl++

## **AFL\+\+ integration into the fuzzing toolchain (replacing vanilla AFL)**

**Problem being solved:** compile fuzzing targets with the `--afl` flag, substituting the clang/clang\+\+ compiler with afl-clang-fast / afl-clang-fast\+\+.

The current vanilla AFL implementation is unmaintained and broken. The details were discussed here: <https://nda.ya.ru/t/lrUJhJBJ7dSnUG>.

In this PR, the vanilla AFL code has been removed, leaving only `aflpp_driver.cpp` (from the AFLplusplus repository), the code that helps convert libfuzzer-like fuzzing harnesses to afl\+\+. Compilation uses the afl\+\+ toolchain, which was added in advance to `build/external_resources/aflplusplus/`.

I had to make changes to the `devtools/ya` code, since I couldn't find any similar cases (selecting several compilers for a single platform depending on a flag). I chose not to register a new compiler, because afl-clang-fast is essentially a wrapper over clang with added passes — so I decided to select the compiler based on the `--afl` flag.
commit_hash:cc138ebf17f07122cbcfdc9a79b371f6b73cd5ca

0 files changed, 0 insertions, 0 deletions