AV1 Decoding does not work on Desktop

[dasisdormax]

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@Frosty-J reported an issue decoding AV1-encoded video files on Windows over at #77.

I tried it myself, encoding the included test video with ffmpeg -i 'libGDX - It's Good For You!.webm' -c:v libaom-av1 -crf 31 -cpu-used 5 -row-mt 1 -tiles 4x1 -c:a copy 'libgdx-av1.webm'.

The resulting file played fine in VLC player, but caused errors when loaded in the test app.

So the issue described can be reproduced. This might be an issue with the cross build environment or compile settings. I'll look into it when I have time.