phosphor-event: Convert options to config file
The systemd unit file for phosphor-event currently hard
codes the maximum buffer size.  Convert this to a systemd
EnvironmentFile so that it can more easily be replaced or
changed on individual systems.

Resolves openbmc/openbmc#216.

Change-Id: I17d471a872248190ca6eace41bc2ea41eb60bee6
Signed-off-by: Sergey Solomin <sergey.solomin@us.ibm.com>
diff --git a/common/recipes-phosphor/obmc-phosphor-event/files/eventd.conf b/common/recipes-phosphor/obmc-phosphor-event/files/eventd.conf
new file mode 100644
index 0000000..b50dfbc
--- /dev/null
+++ b/common/recipes-phosphor/obmc-phosphor-event/files/eventd.conf
@@ -0,0 +1,4 @@
+LOG_SIZE_LIMIT="197376"
+LOG_COUNT_LIMIT="128"
+
+OPTIONS="-s ${LOG_SIZE_LIMIT} -t ${LOG_COUNT_LIMIT}"