add cross build shell script

guowenxue

2021-08-17 544f75c5398469af0aaaa4aead0b09edd7a93099

 3rdparty/local/build.sh

@@ -31,6 +31,8 @@
            rm -rf ${dir}/${dir}*
        fi
    done

    rm -rf install
}

if [[ $# == 1 ]] && [[ $1 == "clean" ]] ; then