Add janitors to the OWNERS file

Test: TreeHugger
Change-Id: I40bae17f5e3ace70f8acad03c5fc05a1d8b135c9
diff --git a/OWNERS b/OWNERS
index fc48548..21ba05c 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,3 +1,4 @@
 [email protected]
 [email protected]
 [email protected]
+include platform/system/core:/janitors/OWNERS #{LAST_RESORT_SUGGESTION}