git: 88417d17c297..ca6c9caa17b3 - vendor/xz - vendor branch updated

[Xin LI]

The branch vendor/xz has been updated by delphij:

URL: https://cgit.FreeBSD.org/src/log/?id=88417d17c297..ca6c9caa17b3

ca6c9caa17b3 Vendor import of xz 5.4.3 (trimmed)