example EXcode (#25578)

paddle/scripts/paddle_build.sh

@@ -1283,10 +1283,10 @@ function example() {
     pip install ${PADDLE_ROOT}/build/python/dist/*.whl
     paddle version
     cd ${PADDLE_ROOT}/tools
-    python sampcd_processor.py cpu 
-    if [ "$?" != "0" ];then
+    python sampcd_processor.py cpu;example_error=$?
+    if [ "$example_error" != "0" ];then
       echo "Code instance execution failed"
-      exit 1
+      exit 5
     fi
 }