[m-rev.] for review: fix asm_fast grades with GCC 6

[Julien Fischer]

Hi Sebastian,

On Mon, 4 Jul 2016, Sebastian Godelet wrote:

> After upgrading to Fedora 23 I wasn’t able to compile the asm_fast.gc grade,
> 
> I reckon this has to do with the following gcc version:
> 
> gcc version 6.1.1 20160621 (Red Hat 6.1.1-3) (GCC)
> 
> Seems that they changed the versioning scheme.

They just bumped their major version number -- I've applied your update
to configure (commit 1abaa23).

Cheers,
Julien.