wic: Ensure internal workdir is not reused
If a path is specified for the internal wic working directory using
the -w/--workdir argument then it must not already exist. Re-using a
previous workdir could easily result in rootfs and intermediate files
from a previous build being added to the current image.
Signed-off-by: Paul Barker <pbarker@konsulko.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit
2e40c8d4109024ff704c5ce40d98050ca7f34dd5)
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
