zpool_add_001_pos needs porting to FreeBSD

[mattmacy]

Fails with:

cannot open 'md0p7': no such device in /dev must be a full path or shorthand device name
ERROR: zpool create -f testpool md0p7 exited 1

md0 created
SUCCESS: set_partition 0  0mb md0
SUCCESS: set_partition 1  0mb md0
SUCCESS: set_partition 3  0mb md0
SUCCESS: set_partition 4  0mb md0
SUCCESS: set_partition 5  0mb md0
SUCCESS: set_partition 6  0mb md0
SUCCESS: set_partition 7  0mb md0
md0 created
md0p1 added
SUCCESS: set_partition 0  512m md0
SUCCESS: set_partition 1 1048616 512m md0
SUCCESS: set_partition 3  512m md0
SUCCESS: set_partition 4  512m md0
SUCCESS: set_partition 5  512m md0
SUCCESS: set_partition 6  512m md0
md1 created
SUCCESS: set_partition 0  0mb md1
SUCCESS: set_partition 1  0mb md1
SUCCESS: set_partition 3  0mb md1
SUCCESS: set_partition 4  0mb md1
SUCCESS: set_partition 5  0mb md1
SUCCESS: set_partition 6  0mb md1
SUCCESS: set_partition 7  0mb md1
md1 created
md1p1 added
SUCCESS: set_partition 0  512m md1
SUCCESS: set_partition 1 1048616 512m md1
SUCCESS: set_partition 3  512m md1
SUCCESS: set_partition 4  512m md1
SUCCESS: set_partition 5  512m md1
SUCCESS: set_partition 6  512m md1
mmacy@beastie3 [~/devel/ZoF|19:49|36] ls /dev/md
md0%    md0p1%  md1%    md1p1%  md2%    md2p1%  mdctl%

System information

Type	Version/Name
Distribution Name
Distribution Version
Linux Kernel
Architecture
ZFS Version
SPL Version

Describe the problem you're observing

Describe how to reproduce the problem

Include any warning/errors/backtraces from the system logs

[Deleted user]

Done.