We will want to create headers that live outside the final image at some point
(eg. to build the file before we even know where to place it).
Change-Id: Ie4c0323df8d5be955aec3621b75309e8f11fae49
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: http://review.coreboot.org/11219
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>