innovus: 加IO buffer

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set fid [open $net_file w]

foreach port_name $input_ports {

set net [get_nets -q -of_object [get_ports $port_name]]

set net_name [get_attribute $net full_name]

puts $fid $net_name

}

close $fid

attachIOBuffer -in BUFFD4BWP6T16P96CPDULVT -status fixed -suffix PORT_BUF -selNetFile