x86: image: cleanup before creating image

There can be some leftovers from other image recipes, if the same
directory names are used and multiply image types are selected.
Therefore remove directories used in the recipe, before contents for the
image are prepared.

Signed-off-by: Tomasz Maciej Nowak <[email protected]>

target/linux/x86/image/Makefile

@@ -60,6 +60,7 @@ ifneq ($(CONFIG_GRUB_IMAGES),)
 
   define Image/Build/grub2
 	# left here because the image builder doesnt need these
+	rm -fR $(KDIR)/root.grub $(KDIR)/grub2
 	$(INSTALL_DIR) $(KDIR)/root.grub/boot/grub $(KDIR)/grub2
 	$(CP) $(KDIR)/bzImage $(KDIR)/root.grub/boot/vmlinuz
 	grub-mkimage \
@@ -93,6 +94,7 @@ ifneq ($(CONFIG_GRUB_IMAGES),)
 endif
 
 define Image/Build/iso
+	rm -fR $(KDIR)/root.grub $(KDIR)/grub2
 	$(INSTALL_DIR) $(KDIR)/root.grub/boot/grub $(KDIR)/grub2
 	$(CP) $(KDIR)/bzImage $(KDIR)/root.grub/boot/vmlinuz
 	grub-mkimage \