Ensure ROOT_BUILD_DIR exists

benchmarks/single/single.sh

@@ -31,6 +31,9 @@ if [[ "$?" -ne "0" ]] ; then
 fi
 
 # Analysis
+ls -al ${LOCAL_PREFIX}
+ls -al ${ROOT_BUILD_DIR} || true
+mkdir -p ${ROOT_BUILD_DIR}
 root -l -b -q "benchmarks/single/analyze.cxx+(\"${JUGGLER_REC_FILE}\")"
 if [[ "$?" -ne "0" ]] ; then
   echo "ERROR analysis failed"