Revert: "security/yubikey-manager-qt: Remove expired port"

This reverts commit 5aaae75d74b38beb1391200f9b29d00904b240df.

security/py-yubikey-manager no longer depends on security/libu2f-host
since commit 0708111995957ebffe65a018c997be9b7d3d681c

Reported by: Jan Henrik Sylvester <me@janh.de>