Increase RAM quota for Nic::Connection

At least on foc_x86_64, nic_router refused to create sessions for the
test clients as the session object's size exceeds the old quota
donation.

Ref #2139

repos/os/include/nic_session/connection.h

@@ -35,7 +35,8 @@ struct Nic::Connection : Genode::Connection<Session>, Session_client
 	{
 		return session(parent,
 		               "ram_quota=%ld, tx_buf_size=%ld, rx_buf_size=%ld, label=\"%s\"",
-		               6*4096 + tx_buf_size + rx_buf_size, tx_buf_size, rx_buf_size, label);
+		               32*1024*sizeof(long) + tx_buf_size + rx_buf_size,
+		               tx_buf_size, rx_buf_size, label);
 	}
 
 	/**