gst: Failed to initialize tracer plugins when statically linked
Because gst_init() initialize the tracing system before the tracer plugin is loaded, when statically linked (such as using macro GST_PLUGIN_STATIC_REGISTER.)
https://gitlab.freedesktop.org/gstreamer/gstreamer/blob/master/gst/gst.c#L805-816
If statically linked, it is better to be good to add available API (e.q. gst_tracing_init()).