udev: add g_debug to help diagosing bugs
udev: add g_debug to help diagosing bugs

Figuring out what the udev callout is doing has generally been
hard. Add g_debug logs to help trace the callout execution.

hyperair/libgpod,neuschaefer/libgpod,hyperair/libgpod,neuschaefer/libgpod,hyperair/libgpod,neuschaefer/libgpod,neuschaefer/libgpod,hyperair/libgpod,neuschaefer/libgpod,hyperair/libgpod