package/jack2: add systemd optional dependency

Add systemd optional dependency (enabled by default)

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 166ea61fb4400f9d1b23a89a7a2c1c6fbee62327)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/jack2/jack2.mk

@@ -47,6 +47,13 @@ else
 JACK2_CONF_OPTS += --readline=no
 endif
 
+ifeq ($(BR2_PACKAGE_SYSTEMD),y)
+JACK2_DEPENDENCIES += systemd
+JACK2_CONF_OPTS += --systemd=yes
+else
+JACK2_CONF_OPTS += --systemd=no
+endif
+
 ifeq ($(BR2_PACKAGE_JACK2_LEGACY),y)
 JACK2_CONF_OPTS += --classic
 else