[PATCH][wwwdocs][committed] Extend changes.html entries for arm and aarch64

[Kyrylo Tkachov via Gcc-patches]

Hi all,

Here's a patch that fleshes out the changes.html entries for arm and aarch64.
I did a quick scan through appropriately filtered git logs and wrote up stuff 
that I think is user-visible,
but please shout if you know of things that should be highlighted as there's 
been much great work done this release!

Pushing to wwwdocs.

Thanks,
Kyrill

wwwdocs-13.patch
Description: wwwdocs-13.patch