Reformat all of the cloud SConscripts to be more Pythonic

Reformat all of the cloud SConscripts to be more Pythonic

There are not intended to be any functional changes, and
this set of changes turned out to be relatively minor.

Change-Id: I738b2f2f43d3edd069426daa06ba29f7aaa33bef
Signed-off-by: Mats Wichmann <mats@linux.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/20535
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: George Nash <george.nash@intel.com>
Reviewed-by: Phil Coval <philippe.coval@osg.samsung.com>
(cherry picked from commit b3aa625df006bb6c0a5d6269e6a82219d0bffefc)
Reviewed-on: https://gerrit.iotivity.org/gerrit/20575
Reviewed-by: Pawel Winogrodzki <pawelwi@microsoft.com>
Reviewed-by: Ziran Sun <ziran.sun@samsung.com>