[PATCH][AArch64] request to push AArch64 patches to release 3.4 branch

[Tim Northover]

Hi Bill,

> Okay. I put the patches in.

This commit (r196701 on release_34) seems to have included fragments
of some other commits in addition to r196533 and the tests aren't
passing any more (the particular error concerns sqrt).

Would you like me to disentangle things, or would you prefer to?

Cheers.

Tim.