libusb: claim to be version 1.0.16

We are not 100% compatible with 1.0.16, but implement some
functionality from that version that is required by certain ports.

PR: 277799
PR: 279555 (exp-run)
Event: Kitchener-Waterloo Hackathon 202406
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D45514