[patch] prevent .cfi_personality/.cfi_lsda on !dwarf eh configurations

[Olivier Hainque]

Hello,

ping for https://gcc.gnu.org/ml/gcc-patches/2017-11/msg02537.html

> On Nov 30, 2017, at 10:18 , Olivier Hainque <hainque@adacore.com> wrote:
> 
> Bootstrap is currently broken with Ada on x86_64-windows using SEH exceptions,

>        PR ada/81470 

>        * dwarf2out.c (dwarf2out_do_cfi_startproc): Only emit
>        .cfi_personality or .cfi_lsda if the eh data format is dwarf2.

Thanks much in advance!

With Kind Regards,

Olivier