fix for path issue

Author: anandhu-eng

script/benchmark-program/run-ubuntu.sh

@@ -2,7 +2,7 @@
 
 MLC_TMP_CURRENT_SCRIPT_PATH=${MLC_TMP_CURRENT_SCRIPT_PATH:-$PWD}
 
-cd ${MLC_TMP_CURRENT_SCRIPT_PATH}
+cd "${MLC_TMP_CURRENT_SCRIPT_PATH}"
 if [ ${MLC_ENABLE_NUMACTL} == "1" ]; then 
   sudo apt-get install numactl
 fi