fix(agent): Comment about support.

Author: zsistla

agent/php_execute.c

@@ -491,7 +491,7 @@ static nr_library_table_t libraries[] = {
 
     {"MongoDB", NR_PSTR("mongodb/src/client.php"), nr_mongodb_enable},
 
-    /* php-amqplib RabbitMQ >= 3.7 */
+    /* php-amqplib RabbitMQ; PHP Agent supports php-amqplib >= 3.7 */
     {"php-amqplib", NR_PSTR("phpamqplib/connection/abstractconnection.php"),
      nr_php_amqplib_enable},