Add easy PoC text modifications

poc/Makefile

@@ -1,7 +1,7 @@
 all: exploit.mscsb
 
 clean:
-	rm -f exploit.mscsb payload.s main.s
+	rm -f exploit.mscsb payload.s payload.bin main.s
 
 exploit.mscsb: payload.s Scripts main.s
 	python3 ../pymsc/asm.py
@@ -9,6 +9,10 @@ exploit.mscsb: payload.s Scripts main.s
 payload.s: payload.bin
 	python3 generate_payload.py
 
+payload.bin: crashText.txt
+	cp -f crashText.txt payload.bin
+	printf "\0" >> payload.bin
+
 main.s: rop_setup.s
 	python3 generate_rop.py