Patch merged into coreboot/master: Add option for "timeless" builds

the following patch was just integrated into master:
commit 566dd3576867a513d63855c6fb5b646db301a182
Author: Nico Huber 
Date:   Sun Jan 24 16:00:50 2016 +0100

Add option for "timeless" builds

Builds with BUILD_TIMELESS=1 shall always give a bit identical output
    for stable inputs. This should help verifying that resulting rom files
    stay the same across commits that shouldn't change the outcome.

To be useful for builds that rely on 3rdparty/arm-trusted-firmware,
    this needs a similar change there.

Change-Id: Ia0a22e3e79fbd0abbd2a9071ecbeef6541787a08
    Signed-off-by: Nico Huber 
    Reviewed-on: https://review.coreboot.org/13412
    Tested-by: build bot (Jenkins)
    Reviewed-by: Damien Zammit 
    Reviewed-by: Patrick Georgi

See https://review.coreboot.org/13412 for details.

-gerrit