log: rearrange log function naming

- Rename log_meta() → log_internal(), to follow naming scheme of most
  other log functions that are usually invoked through macros, but never
  directly.

- Rename log_info_object() to log_object_info(), simply because the
  object should be before any other parameters, to follow OO-style
  programming style.

src/modules-load/modules-load.c

@@ -44,7 +44,7 @@ static void systemd_kmod_log(void *data, int priority, const char *file, int lin
                              const char *fn, const char *format, va_list args) {
 
         DISABLE_WARNING_FORMAT_NONLITERAL;
-        log_metav(priority, 0, file, line, fn, format, args);
+        log_internalv(priority, 0, file, line, fn, format, args);
         REENABLE_WARNING;
 }