make our hash extraction scripts executable

tools/bitwarden2hashcat.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 """Utility to extract Bitwarden hash for hashcat from Google Chrome / Firefox / Desktop local data"""
 
 #

tools/mozilla2hashcat.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 #
 # Script to extract the "hash" from a password protected key3.db or key4.db file.
 #