ffmpeg: Update AVPixelFormat and AV_PIX_FMT_* to compile with master

[philipl]

The deprecated PixelFormat and PIX_FMT_* names have been removed in
ffmpeg master.

[fritsch]

@philipl thx very much - let's see if something odd will happen.

jenkins build this please

[FernetMenta]

please do me a favour and don't merge because it will result in a lot of rebasing work for me. On the other hand we don't compile out master against ffmepg master.

[fritsch]

I won't merge ... the old fields are deprecated for a long time now. I will care to rebase after the videoplayer rework is in.

[rbalint]

I have received a similar and more complete patch through the Debian BTS at https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=803831 but it needs to be updated for current master.

[fritsch]

As v16.0 will be shipped with ffmpeg 2.8.x and (the real reason) that we are rewriting VideoPlayer currently which will be merged directly after v16 is out. I would like to ask you - if you could please PR the changes to: https://github.com/FernetMenta/xbmc/commits/master

[philipl]

I've updated the diff here and will also send to your repo.

[fritsch]

@philipl Thank you very much.

[MartijnKaijser]

Already merged