draft release notes for gcc 3.3

[Benjamin Kosnik]

Joe, 

> (Need to say something about C++ binary compatibility, versioning of
> libstdc++ etc).

It's my thought that you should say that 3.3.x is C++ ABI compatible
with 3.2.x. I believe this is certainly the intention.

For instance, libstdc++.so will be versioned at 5.0.4, ie "next in the
series after 3.2.3's libstdc++.so.5.0.3". The current branch passes the
C++ library ABI checks (in the 'make check-abi' rule), so it is assumed
safe.

> 8463 std::ios_base has a non-virtual destructor

8463 is not fixed, nor fixable, for 3.3 due to ABI constraints, sadly.
It is fixed on mainline. Everything else looks ok though.

best,
benjamin