test_io fails on an android emulator running an x86 system image at API level 21.

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ERROR: test_large_file_ops (test.test_io.CIOTest)
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Traceback (most recent call last):
  File "/sdcard/org.bitbucket.pyona/lib/python3.6/test/test_io.py", line 537, in test_large_file_ops
    self.large_file_ops(f)
  File "/sdcard/org.bitbucket.pyona/lib/python3.6/test/test_io.py", line 330, in large_file_ops
    self.assertEqual(f.seek(self.LARGE), self.LARGE)
OverflowError: Python int too large to convert to C long

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ERROR: test_large_file_ops (test.test_io.PyIOTest)
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Traceback (most recent call last):
  File "/sdcard/org.bitbucket.pyona/lib/python3.6/test/test_io.py", line 537, in test_large_file_ops
    self.large_file_ops(f)
  File "/sdcard/org.bitbucket.pyona/lib/python3.6/test/test_io.py", line 330, in large_file_ops
    self.assertEqual(f.seek(self.LARGE), self.LARGE)
  File "/sdcard/org.bitbucket.pyona/lib/python3.6/_pyio.py", line 1632, in seek
    return os.lseek(self._fd, pos, whence)
OverflowError: Python int too large to convert to C long

----------------------------------------------------------------------
Ran 541 tests in 32.829s

FAILED (errors=2, skipped=8)
test test_io failed
test_io took 33 sec
1 test failed:
    test_io
Total duration: 0:00:33