[CI] debug: include *.npy files for the unit tests in the package

MANIFEST.in

 include README.rst buildout.cfg COPYING version.txt requirements.txt
 recursive-include doc *.py *.rst *.png *.ico *.txt
-recursive-include bob/io/stream *.h5 *.png *.json
+recursive-include bob/io/stream *.h5 *.png *.json *.npy