lb api: correct byte order of new_flows_table_length argument
lb api: correct byte order of new_flows_table_length argument

Change-Id: I3ac348a8cb1a515dfe1839eaa084c87719d282e1
Signed-off-by: Andrey "Zed" Zaikin <647130d024d247e067b3097ad3b9d31c779b1c0f@gmail.com>

vpp-dev/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,vpp-dev/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,vpp-dev/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,vpp-dev/vpp,FDio/vpp,vpp-dev/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,vpp-dev/vpp,vpp-dev/vpp,FDio/vpp