Patch merged into coreboot/master: crossgcc/Makefile: clean more, add distclean target

the following patch was just integrated into master:
commit 32c965170512a62659f54fe46d53117a847f97f3
Author: Martin Roth 
Date:   Sun Jun 21 13:05:03 2015 -0600

crossgcc/Makefile: clean more, add distclean target

Update the clean target to remove the intermediate files.  These should
    get removed automatically, but if the build stops in the middle, or if
    the -t command is used for buildgcc, they can be left in the directory.

Add a distclean target that removes the downloaded tarballs as well as
    everything else.

Change-Id: I6ea19e7a499b0c313c1d2eff7e36386204ec834e
    Signed-off-by: Martin Roth 
    Reviewed-on: http://review.coreboot.org/10621
    Tested-by: build bot (Jenkins)
    Reviewed-by: Marc Jones

See http://review.coreboot.org/10621 for details.

-gerrit