Silence merge warnings on artiical types

[Jan Hubicka]

> On Mon, Mar 30, 2015 at 05:02:57 +0200, Jan Hubicka wrote:
> > 	* lto-symtab.c (lto_symtab_merge_decls_2): Silence warnings on
> > 	artificial decls.
> 
> Shouldn't this patch fix libgomp.c++/target-3.C in an offloading-enabled
> configuration?  It still fails...
> 
> libgomp/testsuite/libgomp.c++/../libgomp.c/target-2.c:27:13: warning: type 'struct .omp_data_s.7' violates one definition rule [-Wodr]
>      #pragma omp parallel for reduction(+:s)
>              ^
>      #pragma omp parallel for reduction(+:s)
>              ^
>    double b[3 * x], c[3 * x], d[3 * x], e[3 * x];
>                  ^
>    double b[3 * x], c[3 * x], d[3 * x], e[3 * x];
>                  ^

No, that is an different warning.  Why those types are different? Is this a full warning output?

Honza
> 
>   -- Ilya