lib32-rsyslog: fix wrong systemd server file
lib32-rsyslog: fix wrong systemd server file

When enable multilib on x86-64, it fails to build lib32-rsyslog with
error:

| ERROR: Function failed: SYSTEMD_SERVICE_lib32-rsyslog value lib32-rsyslog.service does not exist

It uses wrong value ${PN}.service to set SYSTEMD_SERVICE. Correct it by
using BPN.

Signed-off-by: Kai Kang <12cd79c4a5e843cb1f0f6ae2d45a5336990c82a6@windriver.com>
Signed-off-by: Martin Jansa <516df3ff67e1fa5d153800b15fb204c0a1a389dc@gmail.com>

WindRiver-OpenSourceLabs/meta-oe-subset,WindRiver-OpenSourceLabs/meta-oe-subset