Update linux reload script

reload.sh

 screen -S client -X quit
 
-pgrep -f "python getstat.py" | xargs kill -9
-pgrep -f "python start_client.py" | xargs kill -9
-
+pkill -f "python start_client.py"
+pkill -f "python getstat.py"
 
 rm -rf mtcmon-rev
 git clone https://git.nju.edu.cn/zhuxh/mtcmon-rev.git