Added build option to decide whether include libocpmapi.so when build liboctbstack.so

Added build option to decide whether include libocpmapi.so when build liboctbstack.so

This option may helpful in case of only server stack used.

This patch was reviewed from https://gerrit.iotivity.org/gerrit/#/c/15185/

Change-Id: Ibb8eabe3c2e0ffb5370977d11a648886eb4b70ab
Signed-off-by: Chul Lee <chuls.lee@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/15663
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Kevin Kane <kkane@microsoft.com>
Reviewed-by: Randeep Singh <randeep.s@samsung.com>