Make sure the object files are put in default output directory
Make sure the object files are put in default output directory

Currently the object files may be not in the default output directory,
if Arduino SDK is installed in the subdirctory of IoTivity project.

Change-Id: I3fb2f6af46e041418fdaedf5ebf93a3d13e21578
Signed-off-by: Caiwen Zhang<48f0592afc0a377911a8c026109b5f1af886755a@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/2125
Tested-by: jenkins-iotivity <09cb29e8a2b473a2c978382eec13ee06fa017bda@opendaylight.org>
Reviewed-by: Erich Keane <ec9f61fe526c14bb62c55d7c978f025ee6b3583d@intel.com>

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