Patch merged into coreboot/master: 3af0aa2 buildgcc: Use per-arch build directories

the following patch was just integrated into master:
commit 3af0aa2533dc4dc7a0a11711c18587cee0104267
Author: Patrick Georgi 
Date:   Tue Sep 17 20:59:52 2013 +0200

buildgcc: Use per-arch build directories

This simplifies debugging and also fixes an issue when build directories
    are kept between buildgcc runs for different architectures.

Change-Id: I5badccd3368e3014680da3eedb607119fff8fa7f
    Signed-off-by: Patrick Georgi 
    Reviewed-on: http://review.coreboot.org/3929
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer 
    Reviewed-by: Paul Menzel

See http://review.coreboot.org/3929 for details.

-gerrit