Patch merged into coreboot/master: cbfstool: allow file data converters to modify the header size

the following patch was just integrated into master:
commit f82049793890cf615e7f7604720f3f8603aced87
Author: Patrick Georgi 
Date:   Tue Aug 11 15:16:24 2015 +0200

cbfstool: allow file data converters to modify the header size

The idea is that they can at some point add extended attributes to the header.
    That also needs to be passed, but let's start simple.

Change-Id: I80359843078b149ac433ee3d739ea192592e16e7
    Signed-off-by: Patrick Georgi 
    Reviewed-on: http://review.coreboot.org/11216
    Tested-by: build bot (Jenkins)
    Reviewed-by: Aaron Durbin

See http://review.coreboot.org/11216 for details.

-gerrit