[clang] [NFC] Precommit test for issue #149512 (PR #153541)

[Lu Weining via cfe-commits]

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SixWeining wrote:

To avoid frequent test updates due to unrelated compiler changes in the future, I tend to only check function attributes: `"target-features"="+64bit,+lasx,-lsx"`.

https://github.com/llvm/llvm-project/pull/153541