build: add additional parameter support to Build/jffs2

Allow specifying additional parameters on Build/jffs2.
This is useful to specify additional options or overriding existing
ones.

Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/17593
Signed-off-by: Sander Vanheule <sander@svanheule.net>

include/image-commands.mk

@@ -438,13 +438,14 @@ endef
 
 define Build/jffs2
 	rm -rf $(KDIR_TMP)/$(DEVICE_NAME)/jffs2 && \
-		mkdir -p $(KDIR_TMP)/$(DEVICE_NAME)/jffs2/$$(dirname $(1)) && \
-		cp $@ $(KDIR_TMP)/$(DEVICE_NAME)/jffs2/$(1) && \
+		mkdir -p $(KDIR_TMP)/$(DEVICE_NAME)/jffs2/$$(dirname $(word 1,$(1))) && \
+		cp $@ $(KDIR_TMP)/$(DEVICE_NAME)/jffs2/$(word 1,$(1)) && \
 		$(STAGING_DIR_HOST)/bin/mkfs.jffs2 --pad \
 			$(if $(CONFIG_BIG_ENDIAN),--big-endian,--little-endian) \
 			--squash-uids -v -e $(patsubst %k,%KiB,$(BLOCKSIZE)) \
 			-o $@.new \
 			-d $(KDIR_TMP)/$(DEVICE_NAME)/jffs2 \
+			$(wordlist 2,$(words $(1)),$(1)) \
 			2>&1 1>/dev/null | awk '/^.+$$$$/' && \
 		$(STAGING_DIR_HOST)/bin/padjffs2 $@.new -J $(patsubst %k,,$(BLOCKSIZE))
 	-rm -rf $(KDIR_TMP)/$(DEVICE_NAME)/jffs2/