fs/jffs2: split commands

Now that we can properly printf a multi-line command, there is no need
to use a single command to gnerate the jffs2 image.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

fs/jffs2/jffs2.mk

@@ -39,8 +39,8 @@ ROOTFS_JFFS2_DEPENDENCIES = host-mtd
 
 ifneq ($(BR2_TARGET_ROOTFS_JFFS2_SUMMARY),)
 define ROOTFS_JFFS2_CMD
-	$(MKFS_JFFS2) $(JFFS2_OPTS) -d $(TARGET_DIR) -o $@.nosummary && \
-	$(SUMTOOL) $(SUMTOOL_OPTS) -i $@.nosummary -o $@ && \
+	$(MKFS_JFFS2) $(JFFS2_OPTS) -d $(TARGET_DIR) -o $@.nosummary
+	$(SUMTOOL) $(SUMTOOL_OPTS) -i $@.nosummary -o $@
 	rm $@.nosummary
 endef
 else