Update mosquitto build shell script to fix install bug

guowenxue

2022-04-10 c7685f9912e89509acff5d2db54f9b3e955df2ee

 apue/1.File_IO/ds18b20.c

@@ -116,5 +116,7 @@
    /* convert string value to float value */
    *temp = atof(ptr)/1000;
   
    close(fd);

    return 0;
}