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
+
+
+rm -rf mtcmon-rev
+git clone https://git.nju.edu.cn/zhuxh/mtcmon-rev.git
+cd mtcmon-rev
+
+nohup python start_client.py > start_client.log 2>&1 &
+
+echo "start_client.py started"