Skip pyobject.so if linking to libpythonx.y breaks

The todo list at 
https://github.com/Singular/Sources/wiki/Spielwiese-TODO-Overview
mentions that 32-bit -systems SW build fail und 64bit systems.
This is caused by the fact, that the detected libpython is incompatible. This patch adds an a priori test and skips pyobject.so in this case.


TC integrated tests are running here:
http://snork:31111/viewLog.html?buildId=3815&tab=buildResultsDiv&buildTypeId=bt6