revert deletion of directories to before commit 9e78b40d

cmake_targets/tools/build_helper

@@ -127,7 +127,7 @@ clean_all_files() {
  set_openair_env
  dir=$OPENAIR_DIR/cmake_targets
  rm -rf $dir/log $OPENAIR_DIR/targets/bin/* 
- rm -rf $dir/lte_build_oai/build $dir/lte-simulators/build
+ rm -rf $dir/lte_build_oai $dir/lte-simulators/build
  rm -rf $dir/oaisim_build_oai/build $dir/oaisim_build_oai/CMakeLists.txt
  rm -rf $dir/autotests/bin $dir/autotests/log $dir/autotests/*/build 
 }