resource: Removing redundant env configuration

resource: Removing redundant env configuration

Moving global environment configuration common for all
platforms into build_common/SConscript and removing repeated
lines from resource/*.

Bug: https://jira.iotivity.org/browse/IOT-1583
Change-Id: I8383c7d2f14b1c9fea286e0836db50b45b45acb2
Signed-off-by: Pawel Winogrodzki <pawelwi@microsoft.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/21947
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: George Nash <george.nash@intel.com>
Reviewed-by: Phil Coval <philippe.coval@osg.samsung.com>