package/dropbear: install dropbear.service to correct dir

The place for package-provided systemd units is /lib/systemd/system.
/etc/systemd/system is for custom units.
Reviewed-by: Samuel Martin <s.martin49@gmail.com>

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/dropbear/dropbear.mk

@@ -53,9 +53,9 @@ endef
 
 define DROPBEAR_INSTALL_INIT_SYSTEMD
 	$(INSTALL) -D -m 644 package/dropbear/dropbear.service \
-		$(TARGET_DIR)/etc/systemd/system/dropbear.service
+		$(TARGET_DIR)/lib/systemd/system/dropbear.service
 	mkdir -p $(TARGET_DIR)/etc/systemd/system/multi-user.target.wants
-	ln -fs ../dropbear.service \
+	ln -fs /lib/systemd/system/dropbear.service \
 		$(TARGET_DIR)/etc/systemd/system/multi-user.target.wants/dropbear.service
 endef