Add janitors to the OWNERS file

Test: TreeHugger
Change-Id: Ib471f12524383cd5deeed2105008d8395677eebc
diff --git a/OWNERS b/OWNERS
index a335a5b..4332dc2 100644
--- a/OWNERS
+++ b/OWNERS
@@ -10,3 +10,4 @@
 [email protected]
 [email protected]
 [email protected]
+include platform/system/core:/janitors/OWNERS #{LAST_RESORT_SUGGESTION}