Patch merged into coreboot/master: coreinfo: Update Makefile

the following patch was just integrated into master:
commit 698366654c7d430ed573ac0a340d843200cd3407
Author: Martin Roth 
Date:   Sat Apr 23 17:33:18 2016 -0600

coreinfo: Update Makefile

- Get the absolute pathname for LIBPAYLOAD_PATH
    - Update distclean:
    --correctly remove .config and .config.old - *.config doesn't match
    .config
    -- remove obsolete files from cleanup

Change-Id: I6aa51b4ac2b392f786aeb12647be5073e6d02df5
    Signed-off-by: Martin Roth 
    Reviewed-on: https://review.coreboot.org/14485
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See https://review.coreboot.org/14485 for details.

-gerrit