Old port names are now the 1st alias with both rawmidi and seqmidi.

To these ends, swap the 1st and 2nd alias of rawmidi and seqmidi, so
that the old generic port names become the 1st alias.

This was suggested by @nedko in jackaudio#945 and seems to be a prudent choice in
order to offer as much backward compatibility as possible. (We keep the
2nd aliases around, too. If a Jack2 client wants to change these, it
should be prepared to first empty the slot anyway.)

linux/alsa/alsa_rawmidi.c

@@ -470,8 +470,8 @@ inline int midi_port_open_jack(alsa_rawmidi_t *midi, midi_port_t *port, int type
 		type | JackPortIsPhysical | JackPortIsTerminal, 0);
 
 	if (port->jack) {
-		jack_port_set_alias(port->jack, alias);
 		jack_port_set_alias(port->jack, old_name);
+		jack_port_set_alias(port->jack, alias);
 		jack_port_set_default_metadata(port->jack, port->device_name);
 	}
 

linux/alsa/alsa_seqmidi.c

@@ -552,9 +552,9 @@ port_t* port_create(alsa_seqmidi_t *self, int type, snd_seq_addr_t addr, const s
 		if (!isalnum(*c) && *c != '/' && *c != '_' && *c != ':' && *c != '(' && *c != ')')
 			*c = '-';
 
-	jack_port_set_alias (port->jack_port, port->name);
 	// set the old port name as an alias -ag
 	jack_port_set_alias (port->jack_port, old_name);
+	jack_port_set_alias (port->jack_port, port->name);
 	jack_port_set_default_metadata (port->jack_port, device_name);
 
 	if (type == PORT_INPUT)