libnxcau.so needs libpulse.so.0 for audio to work, but doesn't
have a DT_NEEDED entry for it, so it's not automatically
detected. This adds the missing entry and libpulseaudio to
buildInputs, enabling autoPatchelfHook to fix the RPATH.
Packages mainly the nxplayer part of the client, since the tray
doesn't work very well without the server / a complete installation.
Use the shipped libs, since nxplayer really doesn't like any others. I
believe they use internally modified versions of many libs.
Audio doesn't work: the libasound.so shipped looks for the alsa config
files in the wrong place, and even if it finds them, it still doesn't
work. Using the one from alsaLib doesn't work either and adds
instability.
