provisioning: Support older g++ (for Tizen)

provisioning: Support older g++ (for Tizen)

It was successfully tested with gcc-4.6.4
 on Tizen:2.3.1:Wearable.

Change-Id: Ib97c4bfe73d1d40ee8a029a016b7d69e2b3e3d99
Origin: https://gerrit.iotivity.org/gerrit/#/c/12059/
Signed-off-by: Philippe Coval <philippe.coval@osg.samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/12059
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Ashwini  Kumar <k.ashwini@samsung.com>
Reviewed-by: Randeep Singh <randeep.s@samsung.com>
(cherry picked from commit c20fd6b9217ac3f0331ad708211d15a5e2be3120)
Reviewed-on: https://gerrit.iotivity.org/gerrit/12161