buildroot

busybox: Make S01logging source a default file

The default syslog parameters are to keep only 200-400 KiB of logs,
which is very few if there is a spammy daemon on the system, or a daemon
that fails and then spams errors that hides the original problem.

Make S01logging source a /etc/default/logging file where these
parameters can be overridden.

Signed-off-by: Nicolas Cavallari <nicolas.cavallari@green-communications.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>