python-gitdb-0.6.4-bp151.3.1

- update to version 0.6.4:
  * no upstream changelog
- additional changes from version 0.6.1:
  * Fixed possibly critical error, see
    https://github.com/gitpython-developers/GitPython/issues/220
- additional changes from version 0.6.0:
  * Added support got python 3.X
  * Removed all async dependencies and all *_async versions of
    methods with it.
- remove python-async: now unneeded
- set a minimum version for python-smmap: required by upstream
- define python_sitearch only for SLE11

- Set license to SDPX style (BSD-3-Clause)
- Remove outdated %clean section
- Use upstream tarball

- Initial package (0.5.4) for openSUSE.