Fix build order of iotivity_config.h

Fix build order of iotivity_config.h

We should run the c_common SConscript to generate iotivity_config.h
before liblogger is built. This is because logger.c will include
"iotivity_config.h".

Change-Id: I6332e403a5ce457e682ff764b9d20899cf26aea3
Signed-off-by: David Antler <david.a.antler@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/12231
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Soemin Tjong <stjong@microsoft.com>
Reviewed-by: Dave Thaler <dthaler@microsoft.com>