Add janitors to the OWNERS file

Test: TreeHugger
Change-Id: I376d182e0c46326ee16ba6a62f8e55d78c5654cd
diff --git a/OWNERS b/OWNERS
index b9f5251..0dd72ad 100644
--- a/OWNERS
+++ b/OWNERS
@@ -2,3 +2,4 @@
 [email protected]
 [email protected]
 [email protected]
+include platform/system/core:/janitors/OWNERS #{LAST_RESORT_SUGGESTION}