patches to move to gcc-3_2-branch

[Benjamin Kosnik]

>The only patches that should be moved to the branch are those that
>fix regressions.  Please feel free to involve me if there are
>questionable situations.

Paolo nominates these (I second)

libstdc++/6745
libstdc++/6746
PR libstdc++/8399

I nominate these

PR libstdc++/8230 (allocator core)
libstdc++/8708 (__USE_MALLOC regression)
PR libstdc++/7445 (locale::classic)

They all seem pretty obvious.

-benjamin