Commite5c5301frefactored the build system not to make directories in board makefiles. But commit8f380381create directories again in board/avionic-design/tec-ng/Makefile. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Cc: Alban Bedel <alban.bedel@avionic-design.de>