Add janitors to the OWNERS file

Test: TreeHugger
Change-Id: I968f7d7dd4033020c8a5d866a5a14735c7b3a57a
diff --git a/OWNERS b/OWNERS
index ccb311a..7575dbe 100644
--- a/OWNERS
+++ b/OWNERS
@@ -3,3 +3,4 @@
 [email protected]
 [email protected]
 
+include platform/system/core:/janitors/OWNERS #{LAST_RESORT_SUGGESTION}