[llvm] [AArch64] Fold the local-exec TLS low relocation into loads and stores (PR #215531)

[Peter Smith via llvm-commits]

https://github.com/smithp35 commented:

Looks like there may be an opportunity to use with a smaller TLS size too. Other than that this looks good to me. 

https://github.com/llvm/llvm-project/pull/215531