Add janitors to the OWNERS file

Test: TreeHugger
Change-Id: I26485eefd163929efcb2b3050cc5b7b9f964f285
diff --git a/OWNERS b/OWNERS
index 4c9283f..c7846ea 100644
--- a/OWNERS
+++ b/OWNERS
@@ -5,3 +5,4 @@
 [email protected]
 [email protected]
 [email protected]
+include platform/system/core:/janitors/OWNERS #{LAST_RESORT_SUGGESTION}