/cfg: Move setup scripts to the pkg directory

...so that everything is together, controlled via a single KConfig
option,  and not split into an extra overlay directory.

Change-Id: I8922d236fb1c337fe46b9b2a07e0dceaae05a444
diff --git a/package/czechlight-cfg-fs/czechlight-cfg-fs.mk b/package/czechlight-cfg-fs/czechlight-cfg-fs.mk
index 2409b82..6798e68 100644
--- a/package/czechlight-cfg-fs/czechlight-cfg-fs.mk
+++ b/package/czechlight-cfg-fs/czechlight-cfg-fs.mk
@@ -1,4 +1,3 @@
-CZECHLIGHT_CFG_FS_INSTALL_TARGET = NO
 CZECHLIGHT_CFG_FS_INSTALL_IMAGES = YES
 CZECHLIGHT_CFG_FS_DEPENDENCIES = host-e2fsprogs
 
@@ -13,4 +12,18 @@
 $(error CZECHLIGHT_CFG_FS_SIZE cannot be empty)
 endif
 
+define CZECHLIGHT_CFG_FS_INSTALL_TARGET_CMDS
+	$(INSTALL) -D -m 0644 \
+		$(BR2_EXTERNAL_CZECHLIGHT_PATH)/package/czechlight-cfg-fs/etc-overlay.service \
+		$(TARGET_DIR)/usr/lib/systemd/system/etc-overlay.service
+	ln -sf ../etc-overlay.service $(TARGET_DIR)/usr/lib/systemd/system/local-fs.target.wants/
+	$(INSTALL) -D -m 0755 \
+		$(BR2_EXTERNAL_CZECHLIGHT_PATH)/package/czechlight-cfg-fs/czechlight-cfg-mount-generator \
+		$(TARGET_DIR)/usr/lib/systemd/system-generators/czechlight-cfg-mount-generator
+	$(INSTALL) -D -m 0644 \
+		$(BR2_EXTERNAL_CZECHLIGHT_PATH)/package/czechlight-cfg-fs/cfg-restore-etc.service \
+		$(TARGET_DIR)/usr/lib/systemd/system/cfg-restore-etc.service
+	ln -sf ../cfg-restore-etc.service $(TARGET_DIR)/usr/lib/systemd/system/local-fs.target.wants/
+endef
+
 $(eval $(generic-package))