Declare behaviors with @polymerBehavior

This makes polymer lint happy.

Change-Id: If7808d901635bfa9b0757ab9bf57257808cf1ce0
diff --git a/polygerrit-ui/app/behaviors/rest-client-behavior.html b/polygerrit-ui/app/behaviors/rest-client-behavior.html
index c515664..08b25db 100644
--- a/polygerrit-ui/app/behaviors/rest-client-behavior.html
+++ b/polygerrit-ui/app/behaviors/rest-client-behavior.html
@@ -18,6 +18,8 @@
 (function(window) {
   'use strict';
 
+
+  /** @polymerBehavior Gerrit.RESTClientBehavior */
   var RESTClientBehavior = {
     ChangeDiffType: {
       ADDED: 'ADDED',