tizen: Enable BT for Tizen:2.4 by default

tizen: Enable BT for Tizen:2.4 by default

It was reported that BT got disabled for Tizen:2.4,
after investigation it appeared that Tizen:2.4 is defined as tizen=2.3
https://build.tizen.org/project/show?project=Tizen%3A2.4%3AMobile

So instead BT is disabled for Tizen:2.2 (defined as tizen=2.1)
https://build.tizen.org/project/prjconf?project=Tizen%3A2.2%3ABase

Bug: https://jira.iotivity.org/browse/IOT-2030
Change-Id: I0ebd08f383c396d913cdbd89801131b544534d23
Signed-off-by: Philippe Coval <philippe.coval@osg.samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/18811
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Ziran Sun <ziran.sun@samsung.com>