```
devel/py-bitstring: Update to 3.1.7
- Update to 3.1.7
- The sdist on PyPI changed from .zip to .tar.gz
- Add NO_ARCH
Reviewed_by: koobs, sbz
Approved by: koobs (ports, mentor, implicit), sbz (maintainer)
Differential_Revision: D30651
MFH: No (catch up with upstream newfeature release)
```