[lld] [X86][LLD] Handle R_X86_64_CODE_6_GOTTPOFF relocation type (PR #117675)

[Feng Zou via llvm-commits]

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fzou1 wrote:

Did you mean it's better to check the bits strictly as for REX2 prefix? Since we may not use EGPR in instructions with NDD/NF, so it's not necessary to check X bits. I've added check for W bits. Seemed it's complicated to check pp bits. I'll take a look and will add later.

https://github.com/llvm/llvm-project/pull/117675