Updated scene.irr files for the ioScene test. I couldn't figure out why the original .irr files where ever used - even going back to the first version when they were created (r3532) those files never worked. But going through the differing values by hand all attributes with different values from the old test-irr's did write the correct value to xml (aka as it was in memory in the scenenodes) so I use now the resulting .irr file as we currently get it. More changes (Linux) for this test coming later, but ioScene test passes now on Windows.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@4089 dfc29bdd-3216-0410-991c-e03cc46cb475