Patch merged into coreboot/master: 51ca10f arch/x86/include/arch/interrupt.h: Add header guards

the following patch was just integrated into master:
commit 51ca10f54837c0e6f08561c6f85dd0d766622a82
Author: Edward O'Callaghan 
Date:   Tue Jul 29 22:27:51 2014 +1000

arch/x86/include/arch/interrupt.h: Add header guards

Change-Id: I34c27bbce3ce958a33d547c727d9733d3b2d1670
    Signed-off-by: Edward O'Callaghan 
    Reviewed-on: http://review.coreboot.org/6400
    Tested-by: build bot (Jenkins)
    Reviewed-by: Paul Menzel 
    Reviewed-by: Marc Jones

See http://review.coreboot.org/6400 for details.

-gerrit