python3-sdbus++: support wheel builds

The latest Yocto code is expecting pip wheels for builds and requires
some tweaks in order to build successfully.  Yocto packages are, by
convention, named 'python3-...' but the sdbusplus setup.py generates
a `sdbusplus` package and the version of the package is simply "1.0".
Forcibly set PYPI_PACKAGE and PV in order to match up with the python
packaging results.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Iebaa7503947312c2fbb133b73522dc5d087d190e