Group static constructors and destructors in specific subsections, take 2

[Jan Hubicka]

> Honza,
>    The proposed patch from http://gcc.gnu.org/ml/gcc-patches/2010-11/msg00983.html
> with the fix from http://gcc.gnu.org/ml/gcc-patches/2010-11/msg01035.html shows
> no regressions on x86_64-apple-darwin10...
> 
> http://gcc.gnu.org/ml/gcc-testresults/2010-11/msg00874.html

Thanks.  I will make at least one extra revision to incorporate Richard's comments once
we are settled, but it is good to know that it generally wroks. I was affraid of getting
section flags wrong by removing all the special cases on cold sections.

Honza
> 
>           Jack