util/nvramtool: Create nvramtool object directories earlier
The existing rule created a potential race condition between creating
the directory and putting files in there, so use our existing
infrastructure for directory creation instead.
Change-Id: If52a9f558c7d9ce85f71ba53232594699c9d357a
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37798
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Jett Rink <jettrink@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>