[compiler-rt] [tsan][RISCV] Add Go support for linux/riscv64 (PR #127295)

[Pengcheng Wang via llvm-commits]

https://github.com/wangpc-pp approved this pull request.

LGTM and please add some description. :-)

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Background for other reviewers: this PR is for supporting race detector in golang and we have already discussed it in RISE/Go meeting.

https://github.com/llvm/llvm-project/pull/127295