[clang] [clang][LoongArch] Emit "target-abi" module flag (PR #223647)

[via cfe-commits]

llvmbot wrote:

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Failed to cherry-pick: 4beeff3c2bf125de9dda8b374ffc9ec052d02810

https://github.com/llvm/llvm-project/actions/runs/35131517924

Please manually backport the fix and push it to your github fork.  Once this is done, please create a [pull request](https://github.com/llvm/llvm-project/compare)

https://github.com/llvm/llvm-project/pull/223647