Update vendor/libarchive to git d85976e7ff4a062e1de6e04dab7bb78e3344768f

Fixed vendor issues:
Issue 553: Fix broken decryption for ZIP files
Issue 657: Allow up to 8k for the test root directory name
Issue 682: Correctly write gnutar filenames of exactly 512 bytes
Issue 708: tar should fail if a named input file is missing
PR 715: Fix libarchive/archive_read_support_format_mtree.c:1388:11:

error: array subscript is above array bounds