ocf.patch for mbedtls compatibility fix

ocf.patch for mbedtls compatibility fix

Fixed to comfirm compatibility in case if no PSK hint received on the client side.

Change-Id: I2860188f966d8a71dbd834873f206b3ae78ec93e
Signed-off-by: Oleksii Beketov <ol.beketov@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/14815
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Joonghwan Lee <jh05.lee@samsung.com>
Reviewed-by: Phil Coval <philippe.coval@osg.samsung.com>
Reviewed-by: Chul Lee <chuls.lee@samsung.com>
Reviewed-by: Randeep Singh <randeep.s@samsung.com>
(cherry picked from commit 12f1087b073263dc6122dd04c06b5ee070d83b32)
Reviewed-on: https://gerrit.iotivity.org/gerrit/14881