[compiler-rt] [scudo] Skip test if mlock fails. (PR #168448)

[Michał Górny via llvm-commits]

mgorny wrote:

Thanks, this makes the tests pass for me. That said, I don't think it's a matter of "linux version" — I've reproduced it 6.12.53 and 6.17.3, on amd64 and arm64, in nspawn containers. My guess would be permissions or something else.

https://github.com/llvm/llvm-project/pull/168448