Add mkdir to path_without essentials

test/test_helper.bash

@@ -165,7 +165,7 @@ path_without() {
       if [ "$found" != "${PYENV_ROOT}/shims" ]; then
         alt="${PYENV_TEST_DIR}/$(echo "${found#/}" | tr '/' '-')"
         mkdir -p "$alt"
-        for util in bash head cut readlink greadlink tr sed xargs basename sort; do
+        for util in basename bash cut greadlink head mkdir readlink sed sort tr xargs; do
           if [ -x "${found}/$util" ]; then
             ln -s "${found}/$util" "${alt}/$util"
           fi