Log Message:
audio: Add sndfile-tools

sndfile-tools is a small collection of programs that use libsndfile and
other libraries to do useful things.

The collection currently includes the following programs:

- sndfile-generate-chirp
- sndfile-jackplay
- sndfile-mix-to-mono
- sndfile-resample
- sndfile-spectrogram
- sndfile-waveform