mv sampcd_processor.py to tools/ (#20761)

* mv sampcd_processor.py to tools

test=develop test=document_fix

* update example script

test=develop test=document_fix

paddle/scripts/paddle_build.sh

@@ -1011,6 +1011,7 @@ function build_document_preview() {
 function example() {
     pip install ${PADDLE_ROOT}/build/python/dist/*.whl
     paddle version
+    cp ${PADDLE_ROOT}/tools/sampcd_processor.py ${PADDLE_ROOT}/python/paddle/fluid
     cd ${PADDLE_ROOT}/python/paddle/fluid
     python sampcd_processor.py cpu 
     if [ "$?" != "0" ];then