git: 2690f2feae43..88417d17c297 - vendor/xz - vendor branch updated

[Xin LI]

The branch vendor/xz has been updated by delphij:

URL: https://cgit.FreeBSD.org/src/log/?id=2690f2feae43..88417d17c297

88417d17c297 Vendor import of xz 5.4.2 (trimmed)