Rebase, BUG: Fixed deepcopy of F-order object arrays.

[charris]

Rebase of #6456.

Fixes a bug with deepcopy of object arrays in F-order:

In [1]: import numpy as np

In [2]: np.__version__       
Out[2]: '1.11.0.dev0+9cc55dc'

In [3]: a = {'a': 1}

In [4]: b = {'b': 2}

In [5]: np.array([[a, b], [a, b]], order='F')
Out[5]: 
array([[{'a': 1}, {'b': 2}],
       [{'a': 1}, {'b': 2}]], dtype=object)

In [6]: import copy

In [7]: copy.deepcopy(np.array([[a, b], [a, b]], order='F'))
Out[7]: 
array([[{'a': 1}, {'a': 1}],
       [{'b': 2}, {'b': 2}]], dtype=object)

This was discovered as part of a bug found with biggus in SciTools/biggus#157.