tizen: prevent building as seems unsuported on 32bit arch

tizen: prevent building as seems unsuported on 32bit arch

Let's disable it for Tizen now, like for android or iOS.

Error was observed while building for Tizen:2.3.1:Wearable on i586 or armv7l :

  #error "Requires IEEE 754 floating point!"

Change-Id: Ibd7ccbc0e8405aa3cbace45a2a0ae65ce35c87f3
Signed-off-by: Philippe Coval <philippe.coval@osg.samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/6139
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Sanjeev BA <as2902.b@samsung.com>
Reviewed-by: Ziran Sun <ziran.sun@samsung.com>
Reviewed-by: Uze Choi <uzchoi@samsung.com>