Add victorhsieh to arc WATCHLIST

BUG=None

Review-Url: https://codereview.chromium.org/2714293002
Cr-Commit-Position: refs/heads/master@{#453266}
diff --git a/WATCHLISTS b/WATCHLISTS
index 9fa9e6ed..e5506e4 100644
--- a/WATCHLISTS
+++ b/WATCHLISTS
@@ -1542,6 +1542,7 @@
     'arc': ['[email protected]',
             '[email protected]',
             '[email protected]',
+            '[email protected]',
             '[email protected]'],
     'arc_auth': ['[email protected]'],
     'arc_kiosk': ['[email protected]'],