[llvm] LoongArch: Improve detection of valid TripleABI (PR #147952)

[Lu Weining via llvm-commits]

https://github.com/SixWeining approved this pull request.

LGTM. But I suggest to keep it open for a couple of days in case other people have any comments.

https://github.com/llvm/llvm-project/pull/147952