chore: show file name which fails to decrypt

Author: aviaryan

cryptlib.py

@@ -62,7 +62,7 @@ def update_file(funcptr, flist, key):
         if newData is None:
             newData = data
             failed = True
-            print('FAIL')
+            print('Failed decrypting %s' % file)
         fptr.write(newData)
         fptr.close()
         # check if failed