Update libarchive's vendor dist to version 3.1.2 from release branch.

Git branch:	release
Git commit:	19f23e191f9d3e1dd2a518735046100419965804

Obtained from:	https://github.com/libarchive/libarchive.git
MFV r248590,248594:
Update libarchive to 3.1.2

Some of new features:
  - support for lrzip and grzip compression
  - support for writing tar v7 format
  - b64encode and uuencode filters
  - support for __MACOSX directory in Zip archives
  - support for lzop compresion (external utility)
Retire the mislabeled ENABLE_SUID_SSH knob.