test_describe_with_dirty_suffix: fails on py2 on i686

[ignatenkobrain]

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FAIL: test_describe_with_dirty_suffix (test.test_describe.DescribeDirtyWorkdirTest)
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Traceback (most recent call last):
  File "/builddir/build/BUILD/pygit2-0.23.3/test/test_describe.py", line 106, in test_describe_with_dirty_suffix
    self.assertEqual('thetag-dirty', self.repo.describe(dirty_suffix='-dirty'))
AssertionError: u'thetag-dirty' != u'thetag\x08'
- thetag-dirty
+ thetag�
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