[lld] [llvm] [LTO] Override TargetABI from module flags if present when creating T… (PR #126497)

[Alex Bradbury via llvm-commits]

asb wrote:

> @asb the problem I try to resolve is the LTO is not work at all with ilp32e since this issue...and #100833 may able to fix your issue, although I feel that may not right way to fix your issue even it can help... I could try to reproduce your issue on my hand and see how to improve that

I poked at it a bit more and added a comment [here](https://github.com/llvm/llvm-project/issues/69780#issuecomment-2665273161) with a reproducer, as it seems that issue is acting as a meta-bug of sorts. If you have thoughts on this it would be very welcome.

So although this PR is nothing to do with that problem I isolated, I'll note again that it does result in additional warnings when building the llvm-test-suite vs before it was applied - so I wonder if that's expected?

https://github.com/llvm/llvm-project/pull/126497