package/janus-gateway: add systemd socket support

If systemd is selected, add the systemd package to the dependency list and set
the conf opt --enable-systemd-sockets.

Signed-off-by: Adam Duskett <Aduskett@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/janus-gateway/janus-gateway.mk

@@ -112,4 +112,11 @@ else
 JANUS_GATEWAY_CONF_OPTS += --disable-websockets
 endif
 
+ifeq ($(BR2_PACKAGE_SYSTEMD),y)
+JANUS_GATEWAY_DEPENDENCIES += systemd
+JANUS_GATEWAY_CONF_OPTS += --enable-systemd-sockets
+else
+JANUS_GATEWAY_CONF_OPTS += --disable-systemd-sockets
+endif
+
 $(eval $(autotools-package))