Update baka-mplayer.desktop

Added a MimeType field so it can be recognized by gnome automatically . Copied it from the mpv.desktop file.

etc/baka-mplayer.desktop

@@ -8,6 +8,7 @@ GenericName[hr]=Medijski reproduktor
 Comment=Baka MPlayer is a free and open source, cross-platform, **libmpv** based multimedia player.
 Comment[hr]=Baka MPlayer je slobodan i otvorenog kôda, višeplatformski, **libmpv** temeljen reproduktor.
 Icon=baka-mplayer
-Exec=baka-mplayer %u
+Exec=baka-mplayer %U
 Terminal=false
 Categories=AudioVideo;Video;
+MimeType=application/ogg;application/x-ogg;application/sdp;application/smil;application/x-smil;application/streamingmedia;application/x-streamingmedia;application/vnd.rn-realmedia;application/vnd.rn-realmedia-vbr;audio/aac;audio/x-aac;audio/m4a;audio/x-m4a;audio/mp1;audio/x-mp1;audio/mp2;audio/x-mp2;audio/mp3;audio/x-mp3;audio/mpeg;audio/x-mpeg;audio/mpegurl;audio/x-mpegurl;audio/mpg;audio/x-mpg;audio/rn-mpeg;audio/ogg;audio/scpls;audio/x-scpls;audio/vnd.rn-realaudio;audio/wav;audio/x-pn-windows-pcm;audio/x-realaudio;audio/x-pn-realaudio;audio/x-ms-wma;audio/x-pls;audio/x-wav;video/mpeg;video/x-mpeg;video/x-mpeg2;video/mp4;video/msvideo;video/x-msvideo;video/ogg;video/quicktime;video/vnd.rn-realvideo;video/x-ms-afs;video/x-ms-asf;video/x-ms-wmv;video/x-ms-wmx;video/x-ms-wvxvideo;video/x-avi;video/x-fli;video/x-flv;video/x-theora;video/x-matroska;video/webm;audio/x-flac;audio/x-vorbis+ogg;video/x-ogm+ogg;audio/x-shorten;audio/x-ape;audio/x-wavpack;audio/x-tta;audio/AMR;audio/ac3;video/mp2t;audio/flac;audio/mp4;