Avoid privatization of TLS variables

[Markus Trippelsdorf]

On 2014.09.20 at 05:16 +0200, Jan Hubicka wrote:
> Hi,
> libreoffice fails to build with TLS because of "Cannot load any more object
> with static TLS". Iant pointed out to me the difference that the initial exec
> TLS model is also used by static TLS variables.
> 
> This patch prevents turning TLS variables into static that lets me to finish
> libreoffice build.

This patch triggers an assert in gold:

~ % echo "int main () {}" | g++ -flto -fprofile-generate -x c++ -
ld: internal error in relocate_tls, at/gold/x86_64.cc:3829
collect2: error: ld returned 1 exit status

ld.bfd works fine.

-- 
Markus