fix/(#3781): update pylibafl and python_qemu documentation (#3782)

* pylibafl/docs: fix readme and make test script clearer

* python_qemu/docs: mention lief dependency and add compilation instructions

Author: theKnightsOfRohan

bindings/pylibafl/README.md

@@ -9,8 +9,8 @@ cd LibAFL/bindings/pylibafl
 python3 -m venv .env
 # Activate virtual environment
 source .env/bin/activate
-# Install maturin
-pip install maturin
+# Install dependencies
+pip install maturin distlib patchelf
 # Build python module
 maturin develop
 ```
@@ -19,21 +19,27 @@ This is going to install `pylibafl` python module into this venv.
 
 ## Use bindings
 
-### Example: Running baby_fuzzer in fuzzers/baby_fuzzer/baby_fuzzer.py
+### Example: Running the test fuzzer
 
 First, make sure the python virtual environment is activated. If not, run `source .env/bin/activate
 `. Running `pip freeze` at this point should display the following (versions may differ):
 
 ```ini
-maturin==0.12.6
+distlib==0.4.0
+maturin==1.12.6
+patchelf==0.17.2.4
 pylibafl==0.7.0
-toml==0.10.2
 ```
 
 Then simply run
 
 ```sh
-python PATH_TO_BABY_FUZZER/baby_fuzzer.py
+./test.sh
 ```
 
-The crashes directory will be created in the directory from which you ran the command.
+You should see the following show up after a short pause:
+
+```
+Starting to fuzz from python!
+PylibAFL works!
+```

bindings/pylibafl/test.sh

@@ -1,14 +1,14 @@
 #!/usr/bin/env bash
 
 mkdir in || true
-echo "a" > ./in/a
+echo "a" >./in/a
 
 timeout 10 python3 ./test.py
 export exit_code=$?
 if [ $exit_code -eq 124 ]; then
-  # 124 = timeout happened. All good.
-  exit 0
+    # 124 = timeout happened. All good.
+    echo "PylibAFL works!"
+    exit 0
 else
-  exit $exit_code
+    exit $exit_code
 fi
-

fuzzers/binary_only/python_qemu/README.md

@@ -4,12 +4,22 @@
 
 First, install python bindings (check `LibAFL/bindings/pylibafl`) and use the virtual environment.
 
+Then, install lief.
+```bash
+$ pip install lief
+```
+
 Then, create the `in` folder and put some input inside
 ```bash
 $ mkdir in
 $ echo aaaaa > in/input
 ```
 
+Finally, compile the binary.
+```bash
+$ gcc fuzz.c -o a.out
+```
+
 ## Run
 
 ```bash