MFC r344063,r344088:

MFC r344063,r344088:

MFC r344063:
Sync libarchive with vendor.

Relevant vendor changes:
  PR #1085: Fix a null pointer dereference bug in zip writer
  PR #1110: ZIP reader added support for XZ, LZMA, PPMD8 and BZIP2
            decopmpression
  PR #1116: Add support for 64-bit ar format
  PR #1120: Fix a 7zip crash [1] and a ISO9660 infinite loop [2]
  PR #1125: RAR5 reader - fix an invalid read and a memory leak
  PR #1131: POSIX reader - do not fail when tree_current_lstat() fails
            due to ENOENT [3]
  PR #1134: Delete unnecessary null pointer checks before calls of free()
  OSS-Fuzz 10843: Force intermediate to uint64_t to make UBSAN happy.
  OSS-Fuzz 11011: Avoid buffer overflow in rar5 reader

MFC r344088:
  archive_read_disk_posix.c: initialize delayed_errno

PR:		233006 [3]
Security:	CVE-2019-1000019 [1], CVE-2019-1000020 [2]