[clang] [lld] [llvm] [X86, lld] Add relocation R_X86_64_REX2_GOTPCRELX (PR #106681)

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wwwhhhyyy wrote:

I suppose the name of relocation used by binutils is R_X86_64_CODE_4_GOTPCRELX
Also binutils has added R_X86_64_CODE_5_GOTPCRELX/R_X86_64_CODE_6_GOTPCRELX, for evex relocation
Refer to https://github.com/bminor/binutils-gdb/commit/3d5a60de52556f6a53d71d7e607c6696450ae3e4
and https://github.com/bminor/binutils-gdb/commit/5bc71c2a6b8efb27089baa1fecded82be4f550a7

https://github.com/llvm/llvm-project/pull/106681