svn commit: r311478 - vendor/xz/5.2.3

[Xin LI]

Author: delphij
Date: Fri Jan  6 06:35:56 2017
New Revision: 311478
URL: https://svnweb.freebsd.org/changeset/base/311478

Log:
  Tag xz 5.2.3.

Added:
  vendor/xz/5.2.3/
     - copied from r311477, vendor/xz/dist/