Print IPv6 routing table in the debug message
Print IPv6 routing table in the debug message

Only ip route show command fails to print both IPv4 and IPv6
information. Add an extra command to show IPv6 routing table.

Signed-off-by: Medicine Yeh <ce0f0ca58c98e036a28df53229ac3ccdc6eee9c7@gmail.com>

u-root/u-root,u-root/u-root,u-root/u-root