fix paddle ci script to show more debug log (#47599)

paddle/scripts/paddle_build.sh

@@ -999,6 +999,7 @@ function check_whl_size() {
 }
 
 function generate_upstream_develop_api_spec() {
+    set -x
     cp ${PADDLE_ROOT}/python/requirements.txt /tmp
     pr_whl_size=`du -m ${PADDLE_ROOT}/build/python/dist/*.whl|awk '{print $1}'`
     mkdir -p ${PADDLE_ROOT}/build/pr_whl && mv ${PADDLE_ROOT}/build/python/dist/*.whl ${PADDLE_ROOT}/build/pr_whl/
@@ -1010,14 +1011,17 @@ function generate_upstream_develop_api_spec() {
     cd ${PADDLE_ROOT}
     git fetch upstream $BRANCH
     git checkout -b develop_base_pr -t upstream/$BRANCH
+    echo "upstream develop git log: "
     git log --pretty=oneline -10
 
     dev_commit=`git log -1|head -1|awk '{print $2}'`
     dev_url="https://xly-devops.bj.bcebos.com/PR/build_whl/0/${dev_commit}/paddlepaddle_gpu-0.0.0-cp37-cp37m-linux_x86_64.whl"
     url_return=`curl -s -m 5 -IL ${dev_url} |awk 'NR==1{print $2}'`
     if [ "$url_return" == '200' ];then
+        echo "wget develop whl from bos! "
         mkdir -p ${PADDLE_ROOT}/build/python/dist && wget -q -P ${PADDLE_ROOT}/build/python/dist ${dev_url}
     else
+        echo "compile develop whl localy! "
         if [[ ${cmake_change} ]];then
             rm -rf ${PADDLE_ROOT}/build/third_party
         fi
@@ -1029,6 +1033,7 @@ function generate_upstream_develop_api_spec() {
     endTime_s=`date +%s`
     echo "Build Time: $[ $endTime_s - $startTime_s ]s"
     echo "ipipe_log_param_Build_Time: $[ $endTime_s - $startTime_s ]s" >> ${PADDLE_ROOT}/build/build_summary.txt
+    set +x
 }
 
 function generate_api_spec() {