Add rsyslog config

atrusctl is querying the Atrus device once a minute for status of
different parameters and states. We do not want these messages to fill
up /var/log/messages, and we want them to be easy to grab and send them
as an attachment with a feedback report.

BUG=b:35860447
TEST=Verified that logs are separated to its own file

Change-Id: I94cf5dafd253feefe5a8151a47cdf8a436734516
Signed-off-by: Emil Lundmark <emil@limesaudio.com>
Reviewed-on: https://chromium-review.googlesource.com/450245
Reviewed-by: Dmitry Torokhov <dtor@chromium.org>
diff --git a/conf/rsyslog-atrus.conf b/conf/rsyslog-atrus.conf
new file mode 100644
index 0000000..4b86897
--- /dev/null
+++ b/conf/rsyslog-atrus.conf
@@ -0,0 +1,4 @@
+# This log should never be deleted, but rather keep (at least) the last 512 kB
+# of data, like a circular buffer.
+if ($programname == 'atrusctl') then /var/log/atrus.log
+& stop