I have spent the last two hours trying to run the test - however, it fails with:

root@x064:[/data/prj/python/python-3.6.0.177/Lib/ctypes]../../python util.py
Traceback (most recent call last):
  File "util.py", line 102, in <module>
    import ctypes._aix as aix
  File "/data/prj/python/python-3.6.0.177/Lib/ctypes/_aix.py", line 15, in <module>
    from . import util
  File "/data/prj/python/python-3.6.0.177/Lib/ctypes/util.py", line 102, in <module>
    import ctypes._aix as aix
AttributeError: module 'ctypes' has no attribute '_aix'

I have noticed several issues with the file that used to be named just
./build/_sysconfigdata.py

but is now: ./build/lib.aix-5.3-3.6/_sysconfigdata_m_aix5_.py

I am guessing something is wrong there - I am going to try copying only _aix.py to the Python2 branch and see if it works there -- and also dig deeper into what is going wrong with Python3.6*