libarchive: bump to 3.8.1

libarchive: bump to 3.8.1

This is a feaure and bugfix release.

New features:
bsdtar: support --mtime and --clamp-mtime (#2601)
lib: mbedtls 3.x compatibility (#2602)
7-zip reader: improve self-extracting archive detection (#2088)
xar: xmllite support for the XAR reader and writer (#2388)
zip writer: added XZ, LZMA, ZSTD and BZIP2 support (#2137, #2284, #2391)
zip writer: added LZMA + RISCV BCJ filter (#2403)

Notable security fixes:
rar: do not skip past EOF while reading (#2584)
rar: fix double free with over 4 billion nodes (#2598)
rar: fix heap-buffer-overflow (#2599)
warc: prevent signed integer overflow (#2568)
tar: fix overflow in build_ustar_entry (#2588)

Notable bugfixes:
ibarchive: fix FILE_skip regression (#2642)
compress: Prevent call stack overflow (#2649)
iso9660: always check archive_string_ensure return value (#2651)
tar: Support negative time values with pax (#2634)
tar: Reset accumulated header state after reading macOS metadata blob (#2636)
tar: Keep block alignment after pax error (#2637)
tar: Handle extra bytes after sparse entries (#2643)
windows: check archive_wstring_ensure return value (#2652)
bsdtar: don't hardlink negative inode files together (#2587)
gz: allow setting the original filename for gzip compressed files (#2544)
lib: improve lseek handling (#2564)
lib: support @-prefixed Unix epoch timestamps as date strings (#2606)
rar: support large headers on 32 bit systems (#2596)
tar reader: Improve LFS support on 32 bit systems (#2582)

Full changelog: https://github.com/libarchive/libarchive/compare/v3.7.9...v3.8.1

Build system: x86/64
Build-tested: x86/64
Run-tested: x86/64

Signed-off-by: John Audia <redacted>