Add janitors to the OWNERS file

Test: TreeHugger
Change-Id: I668d4c2c9b21656cd29d329c14f9842e0c97d8d1
diff --git a/OWNERS b/OWNERS
index 05d6f65..fcda0e8 100644
--- a/OWNERS
+++ b/OWNERS
@@ -4,3 +4,4 @@
 [email protected]
 [email protected]
 [email protected]
+include platform/system/core:/janitors/OWNERS #{LAST_RESORT_SUGGESTION}