change flowspec nlri parse and contruct order
change flowspec nlri parse and contruct order

Signed-off-by: Peng Xiao <dc8b7d6a85c199a18f82ef7727e6dbbbae446be2@gmail.com>

meidli/yabgp,meidli/yabgp,smartbgp/yabgp,smartbgp/yabgp