Bug#831355: pulseaudio: Use module-udev-detect instead of module-detect

[Josh Triplett]

On Fri, Jul 29, 2016 at 10:51:09AM -0400, Felipe Sateler wrote:
> I discussed this with upstream:
[...snip...]
> So the way forward would be to patch module-udev-detect to exit
> gracefully if udev is not present. One could even chain load
> module-detect if udev is not available.

Chain-loading module-detect seems sensible, rather than just silently
doing nothing.  (module-udev-detect should probably emit a log message
in this case, to aid in debugging.)