Updated new rule to address source select

Rule 9 select most precated one

Change-Id: I33dcac8f3b03c4bfa76ca7979e9ef2a1b68b57ad

Author: Juha Heiskanen

source/Core/ns_address_internal.c

@@ -690,6 +690,13 @@ const uint8_t *addr_select_source(protocol_interface_info_entry_t *interface, co
             }
         }
 
+        /* Rule 9 select most precated one  */
+        if (policy_SA->precedence > policy_SB->precedence) {
+            PREFER_SA;
+        } else if (policy_SB->precedence > policy_SA->precedence) {
+            PREFER_SB;
+        }
+
         /* Tie */
         PREFER_SA;
     }