x11-clocks/buici-clock: update 0.4.9.4 -> 0.4.10

Major changes:

• integrate remaining debian patches
• use timeout instead of signal to make the clock tick
• switch upstream repo for my GH repo

For the record, buici-clock was originally created by a Debian committer,
and its source has since been maintained in Debian’s Git repository.
The FreeBSD port has been using that repository as its upstream source.

My GitHub repository is now the authoritative upstream for the Debian package.
Therefore, the FreeBSD port should be updated to use it as well, rather than
continuing to track the Debian Git repository.