python-astropy builds fail on s390x due to a numpy issue (#1610996), error message in build.log:

Traceback (most recent call last):
  File "setup.py", line 107, in <module>
    **package_info
  File "/usr/lib/python2.7/site-packages/setuptools/__init__.py", line 129, in setup
    return distutils.core.setup(**attrs)
  File "/usr/lib64/python2.7/distutils/core.py", line 151, in setup
    dist.run_commands()
  File "/usr/lib64/python2.7/distutils/dist.py", line 953, in run_commands
    self.run_command(cmd)
  File "/usr/lib64/python2.7/distutils/dist.py", line 972, in run_command
    cmd_obj.run()
  File "/usr/lib64/python2.7/distutils/command/build.py", line 127, in run
    self.run_command(cmd_name)
  File "/usr/lib64/python2.7/distutils/cmd.py", line 326, in run_command
    self.distribution.run_command(command)
  File "/usr/lib64/python2.7/distutils/dist.py", line 972, in run_command
    cmd_obj.run()
  File "/builddir/build/BUILD/astropy-2.0.8/astropy_helpers/astropy_helpers/setup_helpers.py", line 264, in run
    orig_run(self)
  File "/builddir/build/BUILD/astropy-2.0.8/astropy_helpers/astropy_helpers/commands/build_ext.py", line 292, in run
    np_include = get_numpy_include_path()
  File "/builddir/build/BUILD/astropy-2.0.8/astropy_helpers/astropy_helpers/utils.py", line 95, in get_numpy_include_path
    import numpy
  File "/usr/lib64/python2.7/site-packages/numpy/__init__.py", line 142, in <module>
    from . import add_newdocs
  File "/usr/lib64/python2.7/site-packages/numpy/add_newdocs.py", line 13, in <module>
    from numpy.lib import add_newdoc
  File "/usr/lib64/python2.7/site-packages/numpy/lib/__init__.py", line 8, in <module>
    from .type_check import *
  File "/usr/lib64/python2.7/site-packages/numpy/lib/type_check.py", line 11, in <module>
    import numpy.core.numeric as _nx
  File "/usr/lib64/python2.7/site-packages/numpy/core/__init__.py", line 26, in <module>
    raise ImportError(msg)
ImportError: 
Importing the multiarray numpy extension module failed.  Most
likely you are trying to import a failed build of numpy.
If you're working with a numpy git repo, try `git clean -xdf` (removes all
files not under version control).  Otherwise reinstall numpy.
Original error was: /usr/lib64/python2.7/site-packages/numpy/core/multiarray.so: undefined symbol: LogBase2_128