test/cq-full: update for IORING_FEAT_NODROP
test/cq-full: update for IORING_FEAT_NODROP

We don't overflow with IORING_FEAT_NODROP, so the test was flawed if
that flag is set in the features flags.

Signed-off-by: Jens Axboe <cd8c6775e60d6f67a6984377324e5290df3d5358@kernel.dk>

axboe/liburing,axboe/liburing,axboe/liburing