IOT-1583: Removing IoTivity libs from scons Check* calls.

IOT-1583: Removing IoTivity libs from scons Check* calls.

Due to a scons bug (http://scons.tigris.org/issues/show_bug.cgi?id=3036)
part of the build failures were being silently ignored and led
to cases where failing code ended up being merged.

Additionally, scons weren't picking up changes in files influenced
by the mentioned bug, so it required doing a clean build every time.

Change-Id: Ib63fb1105bceafae59573aa0c15af279e8ffdb6d
Signed-off-by: Pawel Winogrodzki <pawelwi@microsoft.com>
Signed-off-by: Philippe Coval <philippe.coval@osg.samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/17641
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Dan Mihai <Daniel.Mihai@microsoft.com>
Reviewed-by: George Nash <george.nash@intel.com>
Reviewed-by: Mike Fenelon <mike.fenelon@microsoft.com>