package/samba4: fix install of systemd files

Since version 4.8.0 and
https://github.com/samba-team/samba/commit/080d590de1ff9f8ebc55aeffaea8d41991466549,
the systemd files (nmd.service, ...) are not available in packaging/systemd

Indeed, they are built in bin/default/packaging/systemd

So use the new --systemd-install-services configure option to install
these files

Fixes:
 - http://autobuild.buildroot.org/results/a09a065c523931c1892e81a99c57521fbe095d8b

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

package/samba4/samba4.mk

@@ -161,13 +161,12 @@ define SAMBA4_INSTALL_INIT_SYSV
 		$(TARGET_DIR)/etc/init.d/S91smb
 endef
 
+ifeq ($(BR2_INIT_SYSTEMD),y)
+SAMBA4_CONF_OPTS += --systemd-install-services
+SAMBA4_DEPENDENCIES += systemd
+endif
+
 define SAMBA4_INSTALL_INIT_SYSTEMD
-	$(INSTALL) -D -m 644 $(@D)/packaging/systemd/nmb.service \
-		$(TARGET_DIR)/usr/lib/systemd/system/nmb.service
-	$(INSTALL) -D -m 644 $(@D)/packaging/systemd/smb.service \
-		$(TARGET_DIR)/usr/lib/systemd/system/smb.service
-	$(INSTALL) -D -m 644 $(@D)/packaging/systemd/winbind.service \
-		$(TARGET_DIR)/usr/lib/systemd/system/winbind.service
 	mkdir -p $(TARGET_DIR)/etc/systemd/system/multi-user.target.wants
 	ln -sf ../../../../usr/lib/systemd/system/nmb.service \
 		$(TARGET_DIR)/etc/systemd/system/multi-user.target.wants/nmb.service