Add zeuthen@ to system/security/OWNERS

Bug: None
Change-Id: I2d096d03a421c5c319b3db1d93b0e510f4d1c1e4
Test: None
diff --git a/OWNERS b/OWNERS
index fca66f8..7d1fd14 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,4 +1,5 @@
 swillden@google.com
 cbrubaker@google.com
 jdanis@google.com
-kroot@google.com
\ No newline at end of file
+kroot@google.com
+zeuthen@google.com
\ No newline at end of file