rng-tools: add systemd service file

recipes-support/rng-tools/rng-tools/rngd.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=Random number generator
+
+[Service]
+Type=forking
+ExecStart=/usr/sbin/rngd
+PIDFile=/var/run/rngd.pid
+KillSignal=SIGQUIT
+
+[Install]
+WantedBy=multi-user.target

recipes-support/rng-tools/rng-tools_%.bbappend

@@ -0,0 +1,12 @@
+inherit systemd
+
+FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
+
+SRC_URI_append = " file://rngd.service"
+
+SYSTEMD_SERVICE_${PN} = "rngd.service"
+
+do_install_append() {
+    install -d ${D}/lib/systemd/system
+    install -m 644 ${WORKDIR}/rngd.service ${D}/lib/systemd/system/
+}