math/py-numpy broken with python3 after r448024

[Anton Yuzhaninov]

Hello,

After this commit:
https://svnweb.freebsd.org/changeset/ports/448024

it is not possible to install math/py-numpy from ports with python3 (I
have PYTHON_VERSION=python3.6 in my /etc/make.conf).

'make install' log: http://termbin.com/0vrd
(TMPPLIST file is broken)

Workaround: partially revert commit r448024 - replace
%%PYTHON_PYOEXTENSION%% by pyo

If %%PYTHON_PYOEXTENSION%% then is TMPPLIST is corrupted by
add-plist-python target in Mk/Uses/python.mk

I'm not sure what is proper fix for this problem, but
%%PYTHON_PYOEXTENSION%% in pkg-plist and USE_PYTHON=py3kplist are not
compatible now (if python3 is used).

-- 
Best Regards,
Anton Yuzhaninov