troubleshooter: log soft id (#436)

## Link to GitHub Issue, if one exists
n/a

## Description of change
Log soft ID (game datecode etc) at the top of auto-troubleshooter output

src/spice2x/util/deferlog.h

@@ -9,6 +9,7 @@ namespace deferredlogs {
     // some shared error messages
     extern const std::initializer_list<std::string> SUPERSTEP_SOUND_ERROR_MESSAGE;
 
+    void set_softid(const std::string& softid);
     void defer_error_messages(std::initializer_list<std::string> messages);
     void dump_to_logger(bool is_crash=false);
 }