tizen: Add support for Tizen:4:Unified (x86_64)

tizen: Add support for Tizen:4:Unified (x86_64)

To use on x86_64:
gbsarch=x86_64 gbsprofile=tizen_4_0_unified_x86_64 ./gbsbuild.sh

Other arch might come later, if needed.

x86_64 was preferred, because that way,
we could run units tests on build hosts (TBC).

Change-Id: Ie827470e85b5eeacdcc3c35a1e596768f74e1e58
Bug: https://jira.iotivity.org/browse/IOT-2397
Signed-off-by: Philippe Coval <philippe.coval@osg.samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/20667
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Mats Wichmann <mats@linux.com>
Reviewed-by: C.J. Collier <cjcollier@linuxfoundation.org>
(cherry picked from commit 71e39d052c37c6fbc85deedb041ff32bf3db417d)
Reviewed-on: https://gerrit.iotivity.org/gerrit/20785
Reviewed-by: Youngman Jung <yman.jung@samsung.com>