test=develop, fix mac ci will not uninstall dependency files when error occurs (#17688)

paddle/scripts/paddle_build.sh

@@ -390,6 +390,19 @@ EOF
         ctest --output-on-failure -j $2
         # make install should also be test when unittest
         make install -j 8
+
+        set +ex
+        if [ "$1" == "cp27-cp27m" ]; then
+            pip uninstall -y paddlepaddle
+        elif [ "$1" == "cp35-cp35m" ]; then
+            pip3.5 uninstall -y paddlepaddle
+        elif [ "$1" == "cp36-cp36m" ]; then
+            pip3.6 uninstall -y paddlepaddle
+        elif [ "$1" == "cp37-cp37m" ]; then
+            pip3.7 uninstall -y paddlepaddle
+        fi
+        set -ex
+
         if [ "$1" == "cp27-cp27m" ]; then
             set -e
             pip install --user ${INSTALL_PREFIX:-/paddle/build}/opt/paddle/share/wheels/*.whl
@@ -403,16 +416,6 @@ EOF
         fi
 
         paddle version
-
-        if [ "$1" == "cp27-cp27m" ]; then
-            pip uninstall -y paddlepaddle
-        elif [ "$1" == "cp35-cp35m" ]; then
-            pip3.5 uninstall -y paddlepaddle
-        elif [ "$1" == "cp36-cp36m" ]; then
-            pip3.6 uninstall -y paddlepaddle
-        elif [ "$1" == "cp37-cp37m" ]; then
-            pip3.7 uninstall -y paddlepaddle
-        fi
     fi
 }