Moving patches from head to 3_1-branch

[B. Kosnik]

> The patches queued for 3.1.1, will be applied *after* the GCC-3.1
> release; the corresponding changelog entries should reflect the dates
> of*actual* checkins.

I think Gaby's right. So, let's just say that checkins on the branch
have the date in the ChangeLog entry that corresponds to the date they
are checked in on the branch.

I'll do two, just to make sure I get it right.

-benjamin