Patch merged into coreboot/master: 02ae0bf build system: Don't run the full build system on "make clean"

the following patch was just integrated into master:
commit 02ae0bf8feb554ab408a9129fd9fffd1dc4cf6aa
Author: Patrick Georgi 
Date:   Sat Feb 9 15:45:02 2013 +0100

build system: Don't run the full build system on "make clean"

When running "make clean" the build system used to parse the entire
    build system. Besides costing time, it prevents cleaning the tree
    if a blobs-board is selected but blobs are not enabled.

Instead, clean always removes all of $(obj) and .xcompile, while
    distclean additionally removes .config and the like.

Besides cleaning up more completely (eg. dependency files), a side
    effect is that this also removes $(obj)/util, if it exists
    (default location for build tools).

Change-Id: Ief6362460d4eb7edcb4b0a47ec76cb9a61bf3b86
    Signed-off-by: Patrick Georgi 
    Reviewed-on: http://review.coreboot.org/2338
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See http://review.coreboot.org/2338 for details.

-gerrit