packaging/build* fix file deletion

Fixed te issue with build-algo and build-server where copied files were
not removed from the packaging folder once the build had ended

packaging/build-algo.sh

@@ -17,5 +17,7 @@ cd "$MY_PWD/$dest_files/data"
 cd "$MY_PWD/$exec_dir"
 bash "$MY_PWD/mkdeb"
 
+cd "$MY_PWD"
+
 remove_files -s="$source_files" -d="$dest_files"
 exit 0

packaging/build-server.sh

@@ -17,5 +17,7 @@ cd "$MY_PWD/$dest_files/data"
 cd "$MY_PWD/$exec_dir"
 bash "$MY_PWD/mkdeb"
 
+cd "$MY_PWD"
+
 remove_files -s="$source_files" -d="$dest_files"
 exit 0