Patch merged into coreboot/master: aab0cce abuild: make build directory configurable with a variable

the following patch was just integrated into master:
commit aab0cce88891197510740ac5a663e003b7f99981
Author: Patrick Georgi 
Date:   Thu Dec 19 20:43:29 2013 +0100

abuild: make build directory configurable with a variable

Allow overriding the build directly (default: coreboot-builds)
    using the COREBOOT_BUILD_DIR variable, in addition to setting
    it through the -o parameter.
    This helps with build nodes where jenkins wants to run the
    same command everywhere but allows different environment
    variables.

Change-Id: If907897cf6ac01caa7d1e4b51aad4c005356bc5b
    Signed-off-by: Patrick Georgi 
    Reviewed-on: http://review.coreboot.org/4543
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See http://review.coreboot.org/4543 for details.

-gerrit