Combine the file and line number into a combination that editors understand when opening files. This makes it easier to edit the errors. Change-Id: Id2fae6a0a2ca8d726b95e252d80ac918f4edbe23 Signed-off-by: Martin Roth <martinroth@google.com> Reviewed-on: https://review.coreboot.org/12561 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>