Support socket activation of systemd

Support socket activation of systemd

This patch is for linux daemon and service.
The rpc-port creates the socket path without communication with amd if
the caller is a daemon or service. The process name must have "d::" prefix
as below:
 e.g. "d::Benchmark"
After this is applied, the rpc-port supports socket activation of system.
The socket path of the daemon is "/run/aul/rpcport/.<proc_name>::<port_name>".

Requires:
 - https://review.tizen.org/gerrit/#/c/platform/core/appfw/aul-1/+/308786/

Change-Id: Ifdd411b2e8b9c745cb9c1cdd9e930df7ab628b9a
Signed-off-by: Hwankyu Jhun <h.jhun@samsung.com>