com: meta: Add OEM "UnifiedSEL" event

Existing Meta BIOS create a "UnifiedSEL" structure for reporting
problems detected by the Host.  These are sent via either IPMI
or PLDM messages.  Create a new-style event for these so that
they can be exposed via Redfish.

Change-Id: I155e90c75f72f1b061646453f13cdc76fee56532
Signed-off-by: Amithash Prasad <amithash@meta.com>
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/gen/com/meta/meson.build b/gen/com/meta/meson.build
index d98d1bb..36df8d2 100644
--- a/gen/com/meta/meson.build
+++ b/gen/com/meta/meson.build
@@ -1,3 +1,4 @@
 # Generated file; do not modify.
 subdir('Hardware')
+subdir('IPMI')
 subdir('Inventory')