Do not needlessly depend on systemd

...because other packages within Buildroot itself typically sue this
pattern instead of blindly serializing package builds. Performance, yay!

Change-Id: Id9e2a7db466f0bfbada0ef0e8c2117e8e3a64061
diff --git a/package/czechlight-rauc/czechlight-rauc.mk b/package/czechlight-rauc/czechlight-rauc.mk
index 3c67e99..0535b6d 100644
--- a/package/czechlight-rauc/czechlight-rauc.mk
+++ b/package/czechlight-rauc/czechlight-rauc.mk
@@ -37,7 +37,7 @@
 endif
 
 CZECHLIGHT_RAUC_INSTALL_TARGET = YES
-CZECHLIGHT_RAUC_DEPENDENCIES = rauc systemd
+CZECHLIGHT_RAUC_DEPENDENCIES = rauc
 
 ifeq ($(BR2_PACKAGE_CZECHLIGHT_RAUC),y)
 
@@ -70,6 +70,7 @@
 		-e "s|CZECHLIGHT_RAUC_SLOT_B_ROOTFS_DEV|$(call qstrip,$(CZECHLIGHT_RAUC_SLOT_B_ROOTFS_DEV))|" \
 		-e "s|CZECHLIGHT_RAUC_SLOT_B_CFG_DEV|$(call qstrip,$(CZECHLIGHT_RAUC_SLOT_B_CFG_DEV))|" \
 		$(TARGET_DIR)/etc/rauc/system.conf
+	mkdir -p $(TARGET_DIR)/usr/lib/systemd/system/multi-user.target.wants/
 	$(INSTALL) -D -m 0644 $(BR2_EXTERNAL_CZECHLIGHT_PATH)/package/czechlight-rauc/rauc-mark-good.service \
 		$(TARGET_DIR)/usr/lib/systemd/system/
 	ln -sf ../rauc-mark-good.service $(TARGET_DIR)/usr/lib/systemd/system/multi-user.target.wants/