Implement Global Inventory Item

For redfish health, to identify the "Global" system
state, we needed something to associate against. This
is documented here:

https://github.com/openbmc/docs/blob/master/designs/redfish_health_rollup.md#chassis--system-health

And first used here:

https://github.com/openbmc/bmcweb/blob/4380545ee6b3985f30060e4828fe5ac3a1e3475e/redfish-core/lib/health.hpp#L171

Change-Id: I2d9f80a9a1108ab6c2c290217059865eb9820ebb
Signed-off-by: James Feist <james.feist@linux.intel.com>
diff --git a/xyz/openbmc_project/Inventory/Item/Global.interface.yaml b/xyz/openbmc_project/Inventory/Item/Global.interface.yaml
new file mode 100644
index 0000000..1d99d93
--- /dev/null
+++ b/xyz/openbmc_project/Inventory/Item/Global.interface.yaml
@@ -0,0 +1,4 @@
+description: >
+    Implement to provide global attributes.
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4