disable hdd->hdd threading. only open log write on write to allow for reads. log fw/ams version.

hdd->hdd threading is disabled due to a bug in libusbhsfs which causes a deadlock if 2 fs calls happen at the same time.

sphaira/include/log.hpp

@@ -12,6 +12,8 @@ extern "C" {
 bool log_file_init();
 bool log_nxlink_init();
 void log_file_exit();
+bool log_is_init();
+
 void log_nxlink_exit();
 void log_write(const char* s, ...) __attribute__ ((format (printf, 1, 2)));
 void log_write_arg(const char* s, va_list* v);