[PATCH RFC V4] Improve 64bit memcpy/memove for Corei7 with unaligned avx instruction

[Ling Ma]

> Please add for each new file the usual copyright header - even for such
> tiny files...
Ling: Ok, We will append it in next version.

>
> Thanks,
> Andreas
> --
>  Andreas Jaeger aj@{suse.com,opensuse.org} Twitter/Identica: jaegerandi
>   SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany
>    GF: Jeff Hawn,Jennifer Guild,Felix Imendörffer,HRB16746 (AG Nürnberg)
>     GPG fingerprint = 93A3 365E CE47 B889 DF7F  FED1 389A 563C C272 A126
>