[source] imx6: fix generating bootfs in imagebuilder (FS#102)

[LEDE Commits]

jow pushed a commit to source.git, branch master:
https://git.lede-project.org/?p=source.git;a=commitdiff;h=35be9284668d19a565d354a33febb508b0e28131

commit 35be9284668d19a565d354a33febb508b0e28131
Author: Jo-Philipp Wich <jo at mein.io>
AuthorDate: Sat Aug 20 20:17:51 2016 +0200

    imx6: fix generating bootfs in imagebuilder (FS#102)
    
    The image builder does not bundle sub-directories within $(KERNEL_BUILD_DIR),
    therfore the intermediate "ventana-uImage.boot" directory is not shipped,
    leading to failures with "make image" later on.
    
    To circumvent the issue, store the intermediate boot files as tar archive
    instead of putting them into a directory to ensure that they end up in the
    final image builder tarball. Fixes FS#102
    
    Signed-off-by: Jo-Philipp Wich <jo at mein.io>
---
 target/linux/imx6/image/Makefile | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/target/linux/imx6/image/Makefile b/target/linux/imx6/image/Makefile
index 2181ea5..6b66376 100644
--- a/target/linux/imx6/image/Makefile
+++ b/target/linux/imx6/image/Makefile
@@ -37,10 +37,16 @@ define Build/boot-overlay
 		--space-fixup --force-compr=zlib --squash-uids \
 		$(MKUBIFS_OPTS) -c 8124 \
 		-o $@.boot.ubifs -d $@.boot
+
+	$(TAR) -C $@.boot -cf $@.boot.tar .
 endef
 
 define Build/bootfs.tar.gz
-	$(TAR) -C $(IMAGE_KERNEL).boot \
+	rm -rf $@.boot
+	mkdir -p $@.boot
+
+	$(TAR) -C $@.boot -xf $(IMAGE_KERNEL).boot.tar
+	$(TAR) -C $@.boot \
 		--numeric-owner --owner=0 --group=0 --transform "s,./,./boot/," \
 		-czvf $@ .
 endef