python-numpy: Add support of ARC architecture

This enables support for ARC cores in numpy.
Cherry-picked from
https://github.com/numpy/numpy/commit/8edd610ffa3499eea3580f98f296ec80578fba73



Hopefully becomes a part of the next major release (like 1.14).

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>