[coreboot-gerrit] Patch merged into coreboot/master: e8792be build rules: Identify build stage with simple variables

the following patch was just integrated into master:
commit e8792be223f5f0c5c6bafffa4056793f3c3bfab7
Author: Kyösti Mälkki 
Date:   Wed Feb 26 15:19:04 2014 +0200

build rules: Identify build stage with simple variables

Provide simple environment variables telling which stage of boot is
    being built. Also move this to arch-agnostic location.

Change-Id: I8cbb5cf91f53e01c06e7d672b5be3f5c235f911d
    Signed-off-by: Kyösti Mälkki 
    Reviewed-on: http://review.coreboot.org/5410
    Reviewed-by: Aaron Durbin 
    Tested-by: build bot (Jenkins)

See http://review.coreboot.org/5410 for details.

-gerrit