plparse: Fix parsing of SMIL playlists
plparse: Fix parsing of SMIL playlists

The mime-type changed in more recent versions of shared-mime-info.

MathieuDuponchelle/totem-pl-parser,MathieuDuponchelle/totem-pl-parser,MathieuDuponchelle/totem-pl-parser,MathieuDuponchelle/totem-pl-parser,pwithnall/totem-pl-parser,pwithnall/totem-pl-parser