Add systemd units for new phosphor-multi-gpio-monitor

Also added sample phosphor-multi-gpio-monitor.json for
configuration of list of GPIO to be monitored. Platform
specific file can be added through bbappend file.

Signed-off-by: Vijay Khemka <vijaykhemka@fb.com>
Change-Id: I3a2fac155be4583aeee52f018da6be0b506633fd
diff --git a/phosphor-multi-gpio-monitor.json b/phosphor-multi-gpio-monitor.json
new file mode 100644
index 0000000..3508995
--- /dev/null
+++ b/phosphor-multi-gpio-monitor.json
@@ -0,0 +1,14 @@
+[
+	{
+		"Name": "PowerButton",
+		"LineName": "POWER_BUTTON",
+		"EventMon": "BOTH",
+		"Continue": true
+	},
+	{
+		"Name": "PowerGood",
+		"ChipId": "0",
+		"GpioNum": 14,
+		"Continue": true
+	}
+]