Patch merged into coreboot/master: Makefile: Allow inclusion of source files from 3rdparty/

the following patch was just integrated into master:
commit d011b6b8325680f3cccca87a685663f5f3b8be88
Author: Nico Huber 
Date:   Wed Oct 5 17:41:31 2016 +0200

Makefile: Allow inclusion of source files from 3rdparty/

Change-Id: I81c6f628f239223ba293a1196f70e4f26e022f6c
    Signed-off-by: Nico Huber 
    Reviewed-on: https://review.coreboot.org/16950
    Tested-by: build bot (Jenkins)
    Reviewed-by: Martin Roth

See https://review.coreboot.org/16950 for details.

-gerrit