They are basically a copy from the old udev package.
Also update the systemd.install file.
Two important issues:
- Since we are using dh_installinit --sourcedirectory now (for the
flavours), we can no longer install files from debian/ via .install
and need to do that manually via debian/rules.
- Splitting up systemd and udev is rather cumbersome as they have many
shared directories. Instead of listing each file individually, we
allow that some files are installed twice and remove them later on via
debian/rules.
