MobileVLCKit: remove libmad from the linking flags
MobileVLCKit: remove libmad from the linking flags

It is under the GPL and in turn no longer part of the distribution

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