Add janitors to the OWNERS file

Test: TreeHugger
Change-Id: I3aaf5fe048d0cf22376203c51009792e1b530738
diff --git a/OWNERS b/OWNERS
index 1db06a6..284398c 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,2 +1,3 @@
 ccross@google.com
 enh@google.com
+include platform/system/core:/janitors/OWNERS #{LAST_RESORT_SUGGESTION}