Linux: Add support for Python compiled with rpath.
Linux: Add support for Python compiled with rpath.

* For example on Travis, the Python2.6 installation lives in /opt
  and has no configuration other than an rpath to find its library.

* We now always add the Python lib path as rpath, to aid loading
  the shared library if needed from there. In cases where it is
  a standard path, it doesn't harm.

kayhayen/Nuitka,kayhayen/Nuitka,kayhayen/Nuitka,kayhayen/Nuitka