Fix cyclic cli for 64 bit integers

[tyilo]

Before this change, pwn cyclic -n 8 -l 0x6161616161616178 outputs:

Traceback (most recent call last):
  File "/home/tyilo/.local/bin/pwn", line 8, in <module>
    sys.exit(main())
  File "/home/tyilo/.local/lib/python3.8/site-packages/pwnlib/commandline/main.py", line 54, in main
    commands[args.command](args)
  File "/home/tyilo/.local/lib/python3.8/site-packages/pwnlib/commandline/cyclic.py", line 73, in main
    pat = flat(pat)
  File "/home/tyilo/.local/lib/python3.8/site-packages/pwnlib/context/__init__.py", line 1460, in setter
    return function(*a, **kw)
  File "/home/tyilo/.local/lib/python3.8/site-packages/pwnlib/util/packing.py", line 732, in flat
    out = _flat(args, preprocessor, make_packer(), filler)
  File "/home/tyilo/.local/lib/python3.8/site-packages/pwnlib/util/packing.py", line 560, in _flat
    val = packer(arg)
  File "/home/tyilo/.local/lib/python3.8/site-packages/pwnlib/util/packing.py", line 426, in <lambda>
    return lambda number: pack(number, word_size, endianness, sign)
  File "/home/tyilo/.local/lib/python3.8/site-packages/pwnlib/util/packing.py", line 145, in pack
    raise ValueError("pack(): number does not fit within word_size [%i, %r, %r]" % (0, number, limit))
ValueError: pack(): number does not fit within word_size [0, 7016996765293437304, 4294967296]

[Arusekk]

Shouldn't this just use cyclic_find() function? It should handle stuff automatically already

[heapcrash]

This should set context.cyclic_size. instead of doing this here.

[tyilo]

That doesn't actually work:

AttributeError: cyclic pattern size cannot be larger than word size

but I can set context.bytes to args.length and it seems to work.

[heapcrash]

Can we at least do bytes= to avoid the unnecessary multiplication? Also this should be rebased since v4.2.0 was released and now this targets v4.4.0dev0

[tyilo]

Done.

[heapcrash]

Mind rebasing this on dev? We just did a release today.

[tyilo]

Rebased.

[zachriggle]

@heapcrash or @Arusekk can you merge this?