Changes to make Linux build with CA_INT flag specified.

Changes to make Linux build with CA_INT flag specified.

These changes also include some work to ensure better global cleanup
in makefiles. Some of this clean up work also overlaps with cleaning
Arduino outputs. This commit only affects makefile builds.

Change-Id: Idcfce740f1ec5766599a1f0aafb5e635647e7692
Signed-off-by: Joseph Morrow <joseph.l.morrow@intel.com>
Signed-off-by: Doug Hudson <douglas.hudson@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/129
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Sashi Penta <sashi.kumar.penta@intel.com>
Reviewed-by: Sudarshan Prasad <sudarshan.prasad@intel.com>