[compiler-rt] [asan] Switch allocator to dynamic base address (PR #98511)

[Thurston Dang via llvm-commits]

thurstond wrote:

> We're seeing a test failure on Mac that started right around this change, see https://crbug.com/360160858#comment6 Does that make any sense to you?

Unfortunately I don't know enough about Mac to know if the leak is genuine, and I don't have a Mac to test whether reverting that change would fix the leak. Instead, I've put in a pull request to revert the Mac-portion of that change: https://github.com/llvm/llvm-project/pull/104818

https://github.com/llvm/llvm-project/pull/98511