Sync libarchive with vendor
Relevant vendor changes:
PR #1013: Add missing h_base offset when performing absolute seeks in
xar decompression
PR #1061: Add support for extraction of RAR v5 archives
PR #1066: Fix out of bounds read on empty string filename for gnutar, pax
and v7tar
PR #1067: Fix temporary file path buffer overflow in tests
IS #1068: Correctly process and verify integer arguments passed to
bsdcpio and bsdtar
PR #1070: Don't default XAR entry atime/mtime to the current time
MFC after: 1 month
b1c91e4b6c