Revert "common/buildstyle/python*: build dir can be used as python identifier"
This reverts commit a02132b2ae.
Actually, the issue with packages using python-distutils-extra hasn't
been solved. On the contrary, python build style now generates malformed
packages, e.g., gufw:
+-- usr
+-- lib
| +-- python3.5
| +-- site-packages
| +-- build3_5
| | +-- lib
| | +-- gufw
| | +-- __init__.py
| | +-- gufw
| | +-- gufw.py
| +-- gufw
| | +-- __init__.py
| | +-- gufw
| | +-- gufw.py
| +-- gufw-17.04.1-py3.5.egg-info
I don't have a clean solution handy right now, but that obviously isn't.