Merge topic 'update-libarchive'

6287b02147 libarchive: Limit xz compression level to 6 on AIX
651ecdddfa Utilities: Add hard-coded try_compile result for libarchive strnlen check
107df8e650 Merge branch 'upstream-LibArchive' into update-libarchive
dadea0e5ce LibArchive 2020-12-26 (227a4b97)
3d05964b02 libarchive: Update script to get 3.5.1

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Merge-request: !6464