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

[Andrei Homescu via llvm-commits]

ahomescu wrote:

> It's unclear to me what goal of this change and what benefit we'll get on Trusty. Could you share more details behind this?

@ChiaHungDuan I had to do a bit of digging to find the rationale behind the original change, but I managed to. See the comment in the latest version of the code for an alternative solution and an explanation.

I'm open to making the code less Trusty-specific if that's a concern.

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