[compiler-rt] [scudo] Avoid splitting aligned allocations on Trusty (PR #69281)

[Andrei Homescu via llvm-commits]

ahomescu wrote:

> It's still possible if trusty requests more than 4 pages.

If you mean that Trusty can request more than 4 pages and we should still apply the original optimization there, I don't know exactly how that would work. On Trusty, we can't split the mapping past `AllocPos`.

Maybe we could make this configurable at either build or run time?

https://github.com/llvm/llvm-project/pull/69281