[openwrt/openwrt] imagebuilder: Remove json_info_files/ before build

[LEDE Commits]

dangole pushed a commit to openwrt/openwrt.git, branch openwrt-19.07:
https://git.openwrt.org/3dbd74d03295f9fc357a88fa2160c75119908bfd

commit 3dbd74d03295f9fc357a88fa2160c75119908bfd
Author: Paul Spooren <mail at aparcar.org>
AuthorDate: Mon Jun 8 18:15:05 2020 -1000

    imagebuilder: Remove json_info_files/ before build
    
    The folder `json_info_files` contains multiple JSON files which describe
    created firmware images. The folder is not removed between builds as the
    ImageBuilder does not use `image.mk`.
    
    Not removing the JSON files result in a merged `profiles.json` file
    containing entries for outdated or non-existing images.
    
    This commit adds the `json_info_files/` cleanup step to the ImageBuilder
    Makefile.
    
    Signed-off-by: Paul Spooren <mail at aparcar.org>
    (cherry picked from commit 941ec28b355ea690b5682d2bf8175aa513379997)
---
 target/imagebuilder/files/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/imagebuilder/files/Makefile b/target/imagebuilder/files/Makefile
index 835dd98ca5..2bdb2b5bde 100644
--- a/target/imagebuilder/files/Makefile
+++ b/target/imagebuilder/files/Makefile
@@ -168,6 +168,7 @@ prepare_rootfs: FORCE
 build_image: FORCE
 	@echo
 	@echo Building images...
+	rm -rf $(BUILD_DIR)/json_info_files/
 	$(NO_TRACE_MAKE) -C target/linux/$(BOARD)/image install TARGET_BUILD=1 IB=1 EXTRA_IMAGE_NAME="$(EXTRA_IMAGE_NAME)" \
 		$(if $(USER_PROFILE),PROFILE="$(USER_PROFILE)")