Fix file_separator

[Toeger]

Inside the lookup file there is an entry_separator with the value '\0' (the only character that cannot be in a filepath in linux) and a file_separator with the value '\1'. Unfortunately '\1' is a valid character in a path name in linux. Therefore libfinder will print the incorrect output when library files or their paths contain a '\1'. To fix this one needs to replace the file_separator with "\0\0" and add logic to support that and not confuse it with the entry_separator.