use iproc to config tdr during bscan

1. case description

　　when running bscan, a serials of pins need to be controlled to 1 by tdr;

　　a static dft signal with default value1 was registered by register_static_dft_signal_names, added as control point of those pins;

　　however, values are not loaded in tdr through jtag network;

2. invoke iproc

　　define command below before process_patterns_specification:

　　 iProcsForModule $block

　　iProc set_tdr {} {

　　　　iWrite <tdr_sri_inst>.tdr 0b1  #depend on the tdr number within the inst

　　　　iApply

　　}

　　read_config_data -in <pattern_spec>/Patterns(JtagBscanPatterns) -from_string {

　　　　ProcdureStep(set_tdr_0) {

　　　　　　iCall(set_tdr) { }

　　　　}

　　}

3. ps

　　may need to reset proc after the icall because that will reset those tdr to 0 again.