FYI: libstdcxx_so_7-branch updated to current mainline

[Paolo Carlini]

Hi,

I have just merged mainline to libstdcxx_so_7-branch with tag 
libstdcxx_so_7-merge-20040817.

While I was at it I have also added a new 
ChangeLog.libstdcxx_so_7-branch which will record all the 
branch-specific changes: I'm planning to commit the first patches before 
the end of the week.

Thanks,
Paolo.