Add janitors to the OWNERS file

Test: TreeHugger
Change-Id: If8ba4f4d611ecd77ef162dc2337c60ba437ca3ea
diff --git a/OWNERS b/OWNERS
index 6ebbd75..efec033 100644
--- a/OWNERS
+++ b/OWNERS
@@ -7,3 +7,4 @@
 [email protected]
 [email protected]
 
+include platform/system/core:/janitors/OWNERS #{LAST_RESORT_SUGGESTION}