sysklogd: install to /sbin

Install syslogd/klogd to /sbin instead of /usr/sbin to really win over
busybox and avoid the ugly noise when booting without busybox installed.
Also drop uninstall hook and manpage installation.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>