update appweb build.sh to fix x86_64 bug

guowenxue

2022-04-09 e4a3dc95bdbb1371a7104fc9cf9c850bcdd3f883

 apue/2.Socket/ds18b20.c

@@ -98,5 +98,7 @@
    /* convert string value to float value */
    *temp = atof(ptr)/1000;
   
    close(fd);

    return 0;
}