[wwwdocs] arm,aarc64: add initial gcc-11/changes.html entries

[Kyrylo Tkachov via Gcc-patches]

Hi all,

This patch adds the arm and aarch64 sections changes.html for GCC 11.
There's more than that that went into the release, but this can serve as a 
starting point for filling the sections in.

Pushing to the repo.
Thanks,
Kyrill

wwwdocs-arm.patch
Description: wwwdocs-arm.patch