Patch merged into coreboot/master: update common base header files

the following patch was just integrated into master:
commit e0a8a88912031feba7f69fe1a7bdfe4c9bda1867
Author: Daisuke Nojiri <[e-mail]>
Date:   Mon Jun 29 13:33:34 2015 -0700

    update common base header files
    
    IS_ENABLED is defined in kconfig.h, thus, should be included in
    libpayload.h.
    
    BUG=none
    BRANCH=tot
    TEST=built coreboot/libpayload for veyron_jerry
    
    Change-Id: I9c5879b6125ac66a75a507ab07a6816ab54ed0ba
    Signed-off-by: Patrick Georgi <[e-mail]>
    Original-Commit-Id: 51dcd58a841009081fdefcadf9aa74286152dde6
    Original-Change-Id: I30e6d87c9de827a214a6100449cd716e773c2ba3
    Original-Signed-off-by: Daisuke Nojiri <[e-mail]>
    Original-Reviewed-on: https://chromium-review.googlesource.com/282587
    Original-Reviewed-by: Randall Spangler <[e-mail]>
    Reviewed-on: http://review.coreboot.org/10781
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer <[e-mail]>


See http://review.coreboot.org/10781 for details.

-gerrit