[PATCH, rs6000] Fix PR target/68872, make -mcpu=powerpc64le pass correct assembler option

[Peter Bergner]

On Thu, 2015-12-24 at 10:15 -0800, Mike Stump wrote:
> On Dec 22, 2015, at 9:13 AM, Peter Bergner <bergner@vnet.ibm.com>
> > gcc/testsuite/
> >        PR target/68772
> 
> Likewise.  Please retroactively update the number in the changelog.

Wow, thanks for catching this!  Fixed everywhere.

Peter