Restored the rule generator bits from udev-171

This restores the rule generator scripts for the persistent
network and optical device rule generator scripts that were
removed after udev-171, and re-introduces their installation
to the build system.

Signed-off-by: Anthony G. Basile <blueness@gentoo.org>
Removed hard-coded paths in rule-writer scripts

Both scripts had hard-coded paths to 'rule_generator.functions'; these were changed
to be substituted in by configure so the paths will match where files are
installed.øy

Signed-off-by: Anthony G. Basile <blueness@gentoo.org>
Initial forward-port of rules.d inotify support

Signed-off-by: Anthony G. Basile <blueness@gentoo.org>
Remove 75-persistent-net-generator.rules reintroduced in commit ef0ac643

75-persistent-net-generator.rules is in the rule_generator subdir, do
not try and install from here.

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