modules: switch protocol-native to the new logging system

This is more complicated than a normal module because we have two
logging topics: mod.protocol-native and conn.protocol-native for wire
messages. Because the latter use spa_debug (through spa_debug_pod) we
need to #define our way around so those too use the right topics.

Note that this removes the previous "connection" category, it is now
"conn.protocol-native" instead.

src/modules/module-protocol-native/v0/protocol-native.c

@@ -44,6 +44,9 @@
 
 #include "../connection.h"
 
+PW_LOG_TOPIC_EXTERN(mod_topic);
+#define PW_LOG_TOPIC_DEFAULT mod_topic
+
 #define PW_PROTOCOL_NATIVE_FLAG_REMAP        (1<<0)
 
 SPA_EXPORT