Fix mktemp to support BSD-based syntax

[andersonvom]

In `tools/config/check_update.sh`, TEMPDIR is created using `mktemp -d`, but this only works for GNU mktemp.
BSD mktemp takes a mandatory template for the file/directory name, which is also supported by GNU mktemp.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/54813

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/54813
Committed: http://github.com/openstack/heat/commit/089c25a4a32fef54d555443a5671682f29acf001
Submitter: Jenkins
Branch: master

commit 089c25a4a32fef54d555443a5671682f29acf001
Author: Richard Lee <email address hidden>
Date: Thu Oct 31 14:34:44 2013 -0500

    Make check_uptodate compatible with BSD shells

    BSD mktemp requires a template for the file/directory name.
    GNU mktemp supports the option, but is not mandatory.

    This change passes in the template, so that the check_uptodate.sh is
    more compatible across different environments.

    Change-Id: Id4abb92054363416272f583600e3d8ff2a9f9d42
    Closes-Bug: 1246858