Patch merged into coreboot/master: Makefile.inc: Include build/dsdt.d if it exists

the following patch was just integrated into master:
commit 92898b424b18760084af8e2d7c242e46bdc6a29b
Author: Martin Roth 
Date:   Wed Dec 9 13:05:00 2015 -0700

Makefile.inc: Include build/dsdt.d if it exists

The dsdt dependency file is created, but wasn't being used to determine
    whether or not to update the dsdt file.  If it's present, include it
    into the makefile so dsdt.aml gets rebuilt if any of the depencencies
    change.

Change-Id: I76bc22541c6b9740841bda891a5b88030cb949cd
    Signed-off-by: Martin Roth 
    Reviewed-on: https://review.coreboot.org/12699
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See https://review.coreboot.org/12699 for details.

-gerrit