Add back missing dependency on u-boot and partition table to all

Change-Id: I7cb442d7877f152a35bee2df37248b19b9a40d76
diff --git a/Makefile b/Makefile
index 83be4c4..3bd28df 100644
--- a/Makefile
+++ b/Makefile
@@ -29,7 +29,7 @@
 	@mkdir -p $(PRODUCT_OUT)/obj
 	@mkdir -p $(ROOTDIR)/cache
 
-all: $(PRODUCT_OUT)/rootfs.img
+all: $(PRODUCT_OUT)/rootfs.img $(PRODUCT_OUT)/u-boot.imx partition-table
 
 help: targets
 targets::