gcc-4.7.x:
 * bump version to [https://gcc.gnu.org/bugzilla/buglist.cgi?bug_status=RESOLVED&resolution=FIXED&target_milestone=4.7.4 4.7.4]
 * update gcc-4.7.x based download toolchain
 * refs #1939


git-svn-id: file:///var/svn/freetz/trunk@12139 149334a1-2f27-0410-a3b9-fc62619ac1e6