[Fuchsia] Fix physical device support in runner scripts

After http://crrev.com/621027 runner scripts add [] around ipv6
addresses for all ssh commands, but it's required only for scp and it
breaks normal ssh command. As result the runner scripts where broken
when used with a physical device (-d).

Change-Id: Ia1aa50cbb09f102f229114ef9c0a5b7f3d127cfe
Reviewed-on: https://chromium-review.googlesource.com/c/1405279
Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
Reviewed-by: Wez <wez@chromium.org>
Commit-Queue: Sergey Ulanov <sergeyu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#621801}
1 file changed