The two build examples, vtkMy and vtkLocal, were not setting the
prefix/suffix for the python modules.  On Windows, modules must
be built with a ".pyd" suffix, because the .dll suffix has been
deprecated since Python 2.5.  On Linux/Unix/OS X, modules should
have the "lib" prefix stripped.

Change-Id: I9b9c6bb1d4ab010a46a4b9237afd5d683b21a02e