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

[Eli Friedman via llvm-commits]

efriedma-quic wrote:

I can see two patches... not sure about three: the change to compiler-rt/CMakeLists.txt is a no-op on its own.

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