MVK: add a new option to build non-scary codecs only
MVK: add a new option to build non-scary codecs only

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