message: doc: afl fuzzing comment about afl-gcc and afl-g++
  This commit includes a short comment in doc/fuzzing.md that gives
  guidance on compiling Bitcoin Core with AFL instrumentation using
  afl-gcc and afl-g++.
diff: @@ -121,6 +121,8 @@ $ git clone https://github.com/google/afl
  $ make -C afl/
  $ make -C afl/llvm_mode/
  $ ./autogen.sh
  +# It is possible to compile with afl-gcc and afl-g++ instead of afl-clang. However, running afl-fuzz
  +# may require more memory via the -m flag.
  $ CC=$(pwd)/afl/afl-clang-fast CXX=$(pwd)/afl/afl-clang-fast++ ./configure --enable-fuzz
  $ make
  # For macOS you may need to ignore x86 compilation checks when running "make". If so,
  