test/socket-rw-offset: skip for kernels without cur position rw
test/socket-rw-offset: skip for kernels without cur position rw

This will fail on kernels that don't have IORING_FEAT_RW_CUR_POS,
so just skip the test if we are running on one of those.

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

axboe/liburing,axboe/liburing,axboe/liburing