更新postinst和postrm

新文件：   com.gitee.uengine.runner.spark.deb

new-deb-build/opt/apps/com.gitee.uengine.runner.spark/files/updatekiller.py

@@ -0,0 +1,33 @@
+#!/usr/bin/env python3
+import sys
+import os
+import atexit
+
+PIDFILE = '/tmp/uengine-runner.pid'
+
+#程序结束时清理pid
+@atexit.register
+def remove_pid():
+    with open(PIDFILE) as pidfile:
+        pidlst = pidfile.readlines()
+    pidlst.remove(str(PID)+'\n')
+    with open(PIDFILE,'w') as pidfile:
+        pidfile.writelines(pidlst)
+
+#更新时结束进程
+def main():
+    for i in open(PIDFILE):
+        try:
+            os.kill(int(i),15)
+        except ProcessLookupError:
+            pass
+    os.remove(PIDFILE)
+
+#当该程序被直接执行时，执行结束进程操作。如果是导入的形式，则只是记录pid
+if __name__ == '__main__':
+    sys.exit(main())
+else:
+    #获取进程pid，用于更新时结束进程
+    PID = os.getpid()
+    with open(PIDFILE,'a') as pidfile:
+        print(PID,file=pidfile) #使用print可以在行末输出换行符，而且可以省去类型转换