Create m2 if it doesn't exist

run.sh

@@ -11,6 +11,8 @@ echo "Got versions $REV"
 if [ -z ${M2_DIRECTORY+x} ]; then
     echo "m2 directory not specified, defaulting to $SCRIPT_DIR/build"
     M2_DIRECTORY="$SCRIPT_DIR/m2"
+
+    mkdir -p "$M2_DIRECTORY"
 fi
 
 IFS=',' read -r -a versions <<< "$REV"