Implement a command line tool "smackpolicy"

The command line tool provides functionality of libsmack functions:
    smack_accesses_sort()
    smack_accesses_union()
    smack_accesses_intersection()
    smack_accesses_complement()
operating on files containing rules and writing output to given file.

Change-Id: I8336efc4fb42e107f2e557da6650b4ed552f5e5f