Pass clpy_tests/test_numpy_interop.py

[LWisteria]

https://github.com/fixstars/clpy/blob/clpy/tests/clpy_tests/test_numpy_interop.py

>       csr1 = clpy.sparse.csr_matrix((5, 3), dtype=numpy.float32)
E       AttributeError: module 'clpy.sparse' has no attribute 'csr_matrix'