simplified the script generation way

[strconv]

Script generation can be simplified in the following way:
replace:

cp the scripts/batch_add_trace.sh of functrace to gnet dir
execute bash batch_add_trace.sh and it will output:

with

# execute in gnet dir:
bash -c "$(curl -fsSL https://raw.githubusercontent.com/bigwhite/functrace/main/scripts/batch_add_trace.sh)"

[bigwhite]

Good advice! I have updated Readme.md according to this.