Intel: Enable threshold event monitoring

This append enables threshold event monitoring in the
phosphor-sel-logger.

Change-Id: I594c4095d3334bd8f798db64b159315edb6aa492
Signed-off-by: Jason M. Bills <jason.m.bills@linux.intel.com>
diff --git a/meta-common/recipes-phosphor/sel-logger/phosphor-sel-logger_%.bbappend b/meta-common/recipes-phosphor/sel-logger/phosphor-sel-logger_%.bbappend
new file mode 100644
index 0000000..4be8ddb
--- /dev/null
+++ b/meta-common/recipes-phosphor/sel-logger/phosphor-sel-logger_%.bbappend
@@ -0,0 +1,2 @@
+# Enable threshold monitoring
+EXTRA_OECMAKE += "-DSEL_LOGGER_MONITOR_THRESHOLD_EVENTS=ON"