iotests: Make 087 pass without AIO enabled

If AIO has not been enabled in the qemu build that is to be tested, we
should skip the "aio=native without O_DIRECT" test instead of failing.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20171115180732.31753-1-mreitz@redhat.com
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
1 file changed