Update test-media for a test where the result is fine.

This is only about position of image elements and it failed because elements are now a little brighter. Probably due to some fix in the driver at some point, but not related to this test.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@5075 dfc29bdd-3216-0410-991c-e03cc46cb475