linux-native: allow multiple processes to all bind to the same multicast 2tuple (#6391)

* cleanup UdpMulticastThread.h preprocessor rules a tiny bit

* bump platform-native to allow for multiple multicast listeners on the same machine

---------

Co-authored-by: Ben Meadors <benmmeadors@gmail.com>

arch/portduino/portduino.ini

@@ -1,6 +1,6 @@
 ; The Portduino based 'native' environment. Currently supported on Linux targets with real LoRa hardware (or simulated).
 [portduino_base]
-platform = https://github.com/meshtastic/platform-native.git#df71ed0040e9aad767a002829330965b78fc452a
+platform = https://github.com/meshtastic/platform-native.git#e82ba1a19b6cd1dc55cbde29b33ea8dd0640014f
 framework = arduino
 
 build_src_filter = 

src/mesh/udp/UdpMulticastThread.h

@@ -23,7 +23,7 @@ class UdpMulticastThread : public concurrency::OSThread
     void start()
     {
         if (udp.listenMulticast(udpIpAddress, UDP_MULTICAST_DEFAUL_PORT, 64)) {
-#if !defined(ARCH_PORTDUINO)
+#ifndef ARCH_PORTDUINO
             // FIXME(PORTDUINO): arduino lacks IPAddress::toString()
             LOG_DEBUG("UDP Listening on IP: %s", WiFi.localIP().toString().c_str());
 #else
@@ -59,7 +59,7 @@ class UdpMulticastThread : public concurrency::OSThread
         if (!mp || !udp) {
             return false;
         }
-#if !defined(ARCH_PORTDUINO)
+#ifndef ARCH_PORTDUINO
         if (WiFi.status() != WL_CONNECTED) {
             return false;
         }