macosx/framework: Add video_dirs to the list of MediaDiscoverer by default.
macosx/framework: Add video_dirs to the list of MediaDiscoverer by default.

simon1984/test,strukturag/VLCKit,programming086/VLCKit,kamcord/VLCKit,programming086/VLCKit,simon1984/test,CollabraMusic/VLCKit,waterskier2007/VLCKit,i386/vlckit,strukturag/VLCKit,larrytin/VLCKit,brion/VLCKit,simon1984/test,larrytin/VLCKit,hpsoar/VLCKit,CollabraMusic/VLCKit,siuying/VLCKit,kamcord/VLCKit,CollabraMusic/VLCKit,waterskier2007/VLCKit,kamcord/VLCKit,siuying/VLCKit,waterskier2007/VLCKit,siuying/VLCKit,hpsoar/VLCKit