[llvm] Allow specifying libcxx builder image. (PR #110303)

[Michael Buch via llvm-commits]

Michael137 wrote:

Hmm so I opened a draft PR with this change and explicitly set `disableASLR` on the DAP server and the tests seemed to pass: https://github.com/llvm/llvm-project/pull/113891

With server patch: https://github.com/llvm/llvm-project/actions/runs/11552969549/job/32154860810?pr=113891
Without server patch: https://github.com/llvm/llvm-project/actions/runs/11557069616/job/32168537938?pr=113891

So it does look like this is still `disableASLR` related. I don't know why simply passing `disableASLR` to the server isn't doing the expected thing. Will have to investigate...

https://github.com/llvm/llvm-project/pull/110303