[compiler-rt] [asan][hwasan] Add config for AArch64 Linux with 39-bit VA. (PR #166881)

[Thurston Dang via llvm-commits]

thurstond wrote:

Thanks for this patch!

Even though it's a small patch, please split it into three parts (compiler-rt, asan, hwasan). e.g., if you implement 39-bit VMA AArch64 support for MSan, it's strange to need a "[asan][hwasan]" patch as a prerequisite. Smaller patches are also easier to debug (e.g., for the HWASan-only patch, we can rule out its impact on any ASan buildbot breakage).

https://github.com/llvm/llvm-project/pull/166881