Create numpy check

EasyBuild runs the following test to check Python's performance after compiling `numpy`
```
python -m timeit -n 3 -r 3 -s "import numpy; x = numpy.random.random((3000, 3000))" "b = numpy.dot(x, x.T);
```

One possible test to run is a dot product and a matrix inversion
```python
import numpy
x = numpy.random.random((3000, 3000))
b = numpy.dot(x, x.T)
c = numpy.linalg.inv(b)
```