VLCKit: remove trailing slash in Pre-Compile.sh
VLCKit: remove trailing slash in Pre-Compile.sh

Remove trailing backslash from the prefix variable. Other locations
in the code adds the required backslash.

Signed-off-by: Jean-Baptiste Kempf <7b85a41a628204b76aba4326273a3ccc74bd009a@videolan.org>

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