package/systemd: add optional valgrind dependency

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/systemd/systemd.mk

@@ -117,6 +117,13 @@ else
 SYSTEMD_CONF_OPTS += -Dpam=false
 endif
 
+ifeq ($(BR2_PACKAGE_VALGRIND),y)
+SYSTEMD_DEPENDENCIES += valgrind
+SYSTEMD_CONF_OPTS += -Dvalgrind=true
+else
+SYSTEMD_CONF_OPTS += -Dvalgrind=false
+endif
+
 ifeq ($(BR2_PACKAGE_XZ),y)
 SYSTEMD_DEPENDENCIES += xz
 SYSTEMD_CONF_OPTS += -Dxz=true