Fix issue with array analysis tests needing scipy.
Fix issue with array analysis tests needing scipy.

This is needed since the implementation of `np.dot` is now an
overload and as a result it must be typed via compilation and if
SciPy is not present this will fail. Fix is to skip this test on
systems with no suitable SciPy.

cpcloud/numba,stuartarchibald/numba,cpcloud/numba,IntelLabs/numba,stonebig/numba,seibert/numba,numba/numba,stonebig/numba,stuartarchibald/numba,numba/numba,stuartarchibald/numba,numba/numba,seibert/numba,numba/numba,IntelLabs/numba,cpcloud/numba,numba/numba,seibert/numba,stonebig/numba,stuartarchibald/numba,IntelLabs/numba,stonebig/numba,stonebig/numba,cpcloud/numba,seibert/numba,cpcloud/numba,seibert/numba,stuartarchibald/numba,IntelLabs/numba,IntelLabs/numba