download-toolchain:
 * bump gcc version to 4.6.4
 * refs #1939

NO-AUTOUPDATE-WARNING: all users must either start with a fresh checkout or backup their .config and call "make distclean" after updating to this revision.


git-svn-id: file:///var/svn/freetz/trunk@10382 149334a1-2f27-0410-a3b9-fc62619ac1e6