Support TCF file for ARC 600 on nSIm

1: can get hello world output by using "nsimdrv -gdb -tcf ~/Desktop/arc625d.tcf
-propsfile /home/yunluz/nSIM_64/systemc/configs/nsim_a600.props"

2: can get hello world output by using "nsimdrv -gdb -propsfile
/home/yunluz/nSIM_64/systemc/configs/nsim_a600.props"

3:cannot get hello world output, but can get into breakpoint by using "nsimdrv
-gdb -tcf ~/Desktop/arc625d.tcf"

4: Set TCF and Prop textfields empty in initialization
Signed-off-by: Yunlu Zhang <Yunlu.Zhang@synopsys.com>