Resolved connectivity folder build issues.

Resolved connectivity folder build issues.

Fixed the connectivity folder build issues.
Fixed build issues for Linux, Tizen, Arduino Platforms.
Connectivity build is enabled from iotivity root folder.
For building tizen, connectivity/build/gbsbuild.sh will be used.

Change-Id: Id8be5f19c6e64f441b0333aa536ad644e9fe6f0b
Signed-off-by: k.karthick <k.karthick@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/893
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Erich Keane <erich.keane@intel.com>