The only functional changes in systemd-udev-196

As far as I can tell these are the only functional changes between the current
eudev codebase and the codebase of systemd-196, in relation to udev hwdb code.
There are some code style differences, and a number of error-trap-and-log
lines that are not present, but that's about it

Signed-off-by: Anthony G. Basile <blueness@gentoo.org>