Adding myself to system/security owners

Needed to approve Rajesh's CLs (Keystore tests) and future Keystore
work.

Test: none
Change-Id: I2e6112dfc092d07c82c94647bb7d44c48e75d83a
diff --git a/OWNERS b/OWNERS
index 752b728..03e5769 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,6 +1,7 @@
 alanstokes@google.com
 cbrubaker@google.com
 drysdale@google.com
+eranm@google.com
 hasinitg@google.com
 jbires@google.com
 jeffv@google.com