Make AppVeyor test suit run silent as in Travis
Make AppVeyor test suit run silent as in Travis

Signed-off-by: phirsov <c6938fa957315fae607f5ae4464befa29d39c210@users.noreply.github.com>

intel/tinycbor,thiagomacieira/tinycbor,intel/tinycbor,01org/tinycbor,intel/tinycbor,01org/tinycbor,intel/tinycbor,01org/tinycbor,thiagomacieira/tinycbor,thiagomacieira/tinycbor,thiagomacieira/tinycbor