Add janitors to the OWNERS file

Test: TreeHugger
Change-Id: I23abe44977b57edb5519f9c4c4e7dc9e233acf03
diff --git a/OWNERS b/OWNERS
index 10c046b..470b72d 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,2 +1,3 @@
 [email protected]
 [email protected]
+include platform/system/core:/janitors/OWNERS #{LAST_RESORT_SUGGESTION}