[bluray] Bump libbluray to version 0.6.1

Since libbluray uses \\\ as path separator on win32 and or udf reader wants to have / after the extension (i.e. the path inside the image) image playback got broken.
https://github.com/ace20022/xbmc/commit/22c13f25dd7ae4baa9aa34a6aed799c0f4e27dbd and https://github.com/ace20022/xbmc/commit/98c3346ad090fd268b337e59ff4744b8e76eb2a3 are two alternatives to fix that issue. A third option would be to patch libbluray. Any thoughts?

@wsnipex I'm pretty sure that I've done the non win32 part wrong ;)