[PATCH][wwwdocs] Add Cortex-A53 erratum workaround note to AArch64 changes for 4.8

[Gerald Pfeifer]

On Friday 2014-11-14 15:06, Kyrill Tkachov wrote:
> Considering that the erratum workaround option was backported to 4.8, 
> I assume we'll need an item for that in the changes.html for that 
> branch?

Good point.

Yes.  It will be good note note which minor release is the first
with this fix, though.

Gerald