pcsc-lite: add bbappend in meta-systemd

* fixes packaging QA warning, when systemd is autodetected:
pcsc-lite-1.8.6: pcsc-lite: Files/directories were installed but not shipped
  /lib
  /lib/systemd
  /lib/systemd/system
  /lib/systemd/system/pcscd.service
  /lib/systemd/system/pcscd.socket

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>