Check for _sounddevice_data directory in setup.py
Check for _sounddevice_data directory in setup.py

Without this, a non-Linux build from the tarball will fail, see #16.

dholl/python-sounddevice,tgarc/python-sounddevice,spatialaudio/python-sounddevice,spatialaudio/python-sounddevice,tgarc/python-sounddevice,dholl/python-sounddevice