[v3] Update Solaris baselines for GCC 4.7, take 2

[Benjamin De Kosnik]

> I was surprised to see GLIBCXX_3.4.15 symbols added, but then realized
> you added the complete set so this seems fine. 

I meant to say: surprised to see GLIBCXX_3.4.16 symbols added, but then
you the complete set so this seems fine. So the only added symbols are
the complete set of GLIBCXX_3.4.16 and then the usual GLIBCXX_3.4.17
ones. Looks good.

-benjamin